Download and install Horizon v1.94+ by zawinul following the detailed installation instructions found there.Install Robco Patcher's Main File. This is for spawning patched weapons onto Weapon Vendors. Also, it's just a neat F4SE mod.Look for the Weapon Mod/s you want patched from this page and follow the Instructions within their Spoiler tag.
Then install my Main File and the Patched Weapon Mod's. Loading both BELOW both the Original Mod's and Horizon in BOTH the left and right panes of Mod Organizer or a similar Mod Manager.

Contains an ESL custom patch that is need by all weapon patches. As it contains custom Market Trading Terminal Traders and is an excuse to ensure that everyone who uses one of my weapon patches, has access to a script file to load Sars99's Horizon Custom Weapon Patch Resources ammo addon script. Which is needed by almost every weapon patch I've made.

The ESL patch also adds the ability to craft .303 British rounds. Rounds that are simply unused within Horizon and have some possible use with some of my patches.

The big change is the re-introduction of the 45.70 caliber round into the game. As in base Horizon 45.70 is replaced by 45.70 ECA rounds. These ECA rounds appear visually as .308 rounds and obviously have a high tech effect. Both visually and mechanically.  Which was fine enough when the only 45.70 capable gun in base Fallout 4 was the Lever Action Rifle.

With the many 45.70 gun mods I intend to patch, not having the original ammo would just make things odd. As well as my love for FNV's Bush Gun, which is the loose basis for the Lever Action Rifle. I wanted a regular 45.70 caliber round in Horizon. 
Its ballistic damage matches the 45.70 ECA round but without any additional damage and with far, far less armor penetrative effect. More in line with a .50 rifle caliber power.

The ammo is added to all the Level List that the 45.70 ECA appears on and thus SHOULD spawn in such situations. As well as being affected by the Scrounger perk. 

The Lever Action Rifle of course regains its ability to fire base 45.70 rounds.

The ECA is otherwise untouched, save for it visually looking more like the 45.70 round it should, when loaded into lever guns etc...
Any issues related to 45.70 anything should be reported in this mod page and not on Horizon's page, nor the official Horizon Discord.

Install the Main File and Update File from their page.

Know that I merged 9mm Pistol (Browning Hi-Power) - Unofficial Update v2.3 by codeblackcrash changes into my patch. (Give them all the love for their efforts!)

Then install my Replacer Patch for the 9mm Pistol.

Hi-Power Pistol: 

Ammo Types - 9mm, .38, and .38 RAD.

Fire Modes - Semi-Auto only.

Notes - Given that I'm allowing this weapon to be chambered in .38, to give it some variety, it felt like a good idea to rename the pistol as well. I also gave the weapon a +1 to its Base Damage to compensate its limited ammo types and weapon attachments. Overall, it should feel like a decent early game pistol, just like it was in New Vegas. But one that loses pretty quickly once you get access to better pistols that also tend to have more weapon attachments.
All of the Uniques for this weapon gained an additional +1 Base Damage (a total of +2!) to again compensate them. 
The "L'Innocence" Unique is essentially a visual variant with that little extra damage from the above, having lost its Legendary Effect.
The "Mare," "Maria," "Bloody Mary" Uniques have all kept their (Unoffical Update) Legendary Effects, albeit they're all lessened per Horizon's Balance.

How to acquire - The Hi-Power can spawn on just about any humanoid within the Commonwealth starting at level 1. 
Weapon Vendors from across the Commonwealth begin selling the Hi-Power starting at level 1 as well.
The Hi-Power Pistol and all its Uniques can be purchased from the Market Trading Terminal under the Trader named "Trevor."
Prices and Trade Skill required to purchase them vary, depending on their rarity.

Issues: I had a hell of time patching this mod, and as such, please be sure to let me know if there are any issues with my patch.

Install the Main File from their page.

Then install my Replacer Patch of it.

Hi-Power Pistol: 

Ammo Types - 9mm, .38, and .38 RAD.

Fire Modes - Semi-Auto only.

Notes - I renamed the pistol due to its ability to be rechambered. Though, I did not bring over the base mod's ability to be chambered in .45, mostly as Alexerator already has a wonderful .45 Pistol (Cavalry Pistol), and I didn't want this gun to step on that ones toes in any way. Unlike Deadpool's 9mm Pistol, this one does have quite a few attachments that can grant the Hi-Power Pistol fairly flat shooting. Thus, I did not increase this mod's version an increase to its Base Damage. Overall, it should feel like a solid early game pistol, and a very faithful rendition of the 9mm Pistol from New Vegas. One that does eventually lose out to other pistols over time, but still a solid means of offloading low caliber rounds on enemies.

How to acquire - The Hi-Power Pistol can spawn on just about any humanoid within the Commonwealth starting at level 1.
Weapon Vendors from across the Commonwealth begin selling the Hi-Power starting at level 1 as well.
The Hi-Power Pistol can be purchased from the Market Trading Terminal under the Trader named "Blap Blap Meister."

Western Standoff: 

Ammo Types - .357, .44, and its speciality rounds.

Fire Modes - Semi-Auto only.

Notes - A very interesting gun. One that I did not expect to be balanced without great effort, but thanks to Alexerator, it actually is pretty much out of the box. As the gun cannot be altered at the Weapons Workbench weapon attachments wise, has a 6 round Magazine limit, and fairly high recoil. But in exchange you have the power of a Revolver and the speed/handling of a Hi-Power Pistol.
Because of those facts, I decided to grant it access to .44, the ability to have its Receiver upgraded (not changed!) and for it to be Augmented. And you can Reverse Engineer it to further enhance it!
Despite that, I don't think it oversteps on the Revolver too much. As the inability to benefit from various Weapon Attachments, ultimately hurt its long term outlook, once you get access to the good stuff for the Revolver.
Let me know how it fares! 

How to acquire - I opted not to change how you acquire this weapon, and thus for further details, check out the base mod's Mod Page on how to do so. It will be found in poor condition though.

Prior to installing this weapon know that in order for you to use my patch, you require Alexerator's Scrap Shotgun and my Hz Patch for it.
Bizzare explanation + bonus:

Install the Main File from their page.

AND 

Install Horizon Mod Attach Point Keyword Managerfollowing this instruction:
"The plugin should be loaded after Z_Horizon_DLC_All.esp and before weapon or armour patches."
Thanks again to Sars99 for this mod and everything related to it! 

Then install my Replacer Patch for the Discharger Laser Pistol.

Discharger Pistol:

Ammo Types - Fusion Cells, Heavy Fusion Cells, and their Armor Piercing versions.

Fire Modes - Burst Fire and Charged Burst Fire.

Notes - A very interesting weapon, which acts more like a pistol sized shotgun outside of VATS. But in VATS, its absurdly lethal. Acting like a pinpoint three round laser pistol burst. Despite that it isn't too OP due to its pretty high AP cost. Its weapon attachments are similar but not the same as a Laser Guns. As it has some things similar to a Ballistic Pistol, like Magazine Capacity. Overall, this should feel like a neat weapon, without being too OP, unless you build for it.
The "Prototype PP-77 "Pheonix"" (I'm not sure if that's intentional spelling?) still has a Legendary Effect, this now being a more simple +10% Damage and coming with high quality Weapon Attachments.
The "Prototype PV-69 "Vaporizer"" has lost its "Legendary Effects" but still has its unique 6 round burst mechanic and comes alongside very high weapon attachments.

How to acquire - The Discharger Pistol spawns on Gunner Energy Weapons users, Gunner Bosses, and BoS members from level 12 onwards.
Weapon Vendors from across the Commonwealth have a rare chance to sell the Discharger Pistol after level 18. Though the Brotherhood of Steel Weapon Vendors have a higher chance than most and sell it earlier at level 12.
The "Prototype PP-77 "Pheonix"" can also be found at the Weapon Vendor named Proctor Teagan after level 12.
The Discharger Pistol and the "Prototype PP-69 "Vaporizer"" can be purchased from the Market Trading Terminal under the Traders named "Gunari Mettbach" and "Blap Blap Meister" respectively.
Prices and Trade Skill required to purchase them vary, depending on their rarity.

Install the Main File from their page.

AND 

Install Horizon Mod Attach Point Keyword Manager following this instruction:
"The plugin should be loaded after Z_Horizon_DLC_All.esp and before weapon or armour patches."
Thanks again to Sars99 for this mod and everything related to it!

Then install my Replacer Patch for the Police Shotgun.

Police Shotgun:

Ammo Types - All 12-gauge shotgun shells.

Fire Modes - Semi-Auto only.

Notes - Finally, a pump action shotty! Other than giving this weapon a +2 Base Damage compared to a Combat Shotgun, and keeping its Unique Thermal Scope intact. There isn't too much to talk about. The damage increase was simply to give this weapon some legs given its low fire rate and magazine (tube) capacity.
It should fare well throughout the game.
The "Unfinished Business" Unique has kept its Legendary Effect, though its been reduced per Horizon balance. And is now mostly just a gun that comes with a lot of high-end attachments.
The "Search Warrant" Unique has also kept its Legendary Effect, and again its been reduced per Horizon's balance.

How to acquire - The Police Shotgun can be found in the hands of Gunners, Raiders, BoS, and Railroad members. Starting at level 12.
Weapon Vendors from across the Commonwealth may have the Police Shotgun in their stocks starting from level 12.
The Police Shotgun, "Unfinished Business" and "Search Warrant" can be purchased from the Market Trading Terminal. With the first two being sold by the Trader "Gunari Mettbach" and "Search Warrant" from the Trader "Blap Blap Meister."

Install the Main File found on their page.

AND 

Install Super Mutant Equality a Super Mutant Weapon Expansion by Brainstormepilog
My replacer patch adds the AA12 to Super Mutant level list via Horizon's Quest Addon and will cause the mutants to not use the weapon properly.

Then install my Replacer Patch of The Assault Shotgun.

Automatic Assault Shotgun:

Ammo Types - All the 12 gauge variants, typical for a shotgun.

Fire Modes - Full Auto only.

Notes - Most notable, because Horizon already has a whole ammo system, the extra shotgun ammo types that were included as a weapon attachment in the base mod are now removed. Balance wise, I think this is pretty even keel with the vanilla combat shotgun. As I imagine the mod authors intended. Now it works for Horizon!
The "Atom's Might" Unique has kept its Legendary Effect in spirit. As it now deals 5 less Ballistic Damage in exchange for a bonus 5 Rad Damage. As well as having its unique Receiver altered into being a sort of 'Irradiated Heavy Frame Receiver +'. Dealing an extra 10 Rad Damage but having an additional +15% VATS Cost. 
The "Bandit Blaster" Unique is no longer one, having lost its Legendary Effect and is now sort of a 'rare' weapon that spawns with a sort of rugged assortment of weapon attachments.
The "Burning Rubber" Unique has lost its Legendary Effect and is now simply a visually different looking Assault Shotgun that comes with a Hair Trigger Receiver.

How to acquire - The Automatic Assault Shotgun spawns on Raiders, Gunners, BoS, Super Mutants, and rarely on Children of Atom starting at around level 10-16.
The "Bandit Blaster" rarely spawns on Raiders after level 16.
BoS Weapon Vendors begin selling the Automatic Assault Shotgun at level 10, while Caravan, Workshop, Goodneighbor, and Railroad vendors begin selling them at level 15.
The Automatic Assault Shotgun and the "Burning Rubber" variant can be purchased from the Market Trading Terminal under the Trader "Pete the Wheat." 
Prices and Trade Skill required to purchase them vary, depending on their rarity.
While the "Atom's Might" Unique variant can be crafted at the Weapons Lab. Assuming you have a relatively high combination of Science, Gunsmithing, and a little bit of Engineering Skill. As well as a basic Assault Shotgun and various crafting materials.

Install "The Riot Shotgun Vanilla" Main File from their page.

AND 

Install Horizon Mod Attach Point Keyword Managerfollowing this instruction:
"The plugin should be loaded after Z_Horizon_DLC_All.esp and before weapon or armour patches."
Thanks again to Sars99 for this mod and everything related to it!

AND 

Install Super Mutant Equality a Super Mutant Weapon Expansion by Brainstormepilog
My replacer patch adds the Riot Shotgun to Super Mutant level list via Horizon's Quest Addon and will cause the mutants to not use the weapon properly.

Then install my Replacer Patch of The Riot Shotgun.

Riot Shotgun:

Ammo Types - All the 12 gauge variants, typical for a shotgun. 

Fire Modes - Semi Auto only.

Notes - Notably, because Horizon already has a whole ammo system, the extra shotgun ammo types that were included as a weapon attachment in the base mod are now removed.
In many ways, the Riot Shotgun is a clear upgrade to the Assault Shotgun in the above entry. As it starts with a higher Magazine Size and more weapon attachments which help it scale further into late game than any other Combat Shotguns. Ultimately leading it to be the best of the bunch. Because of that its price and rarity is increased in comparison to the Assault Shotgun and perhaps the Vanilla Combat Shotgun (testing on that needed).
The "Scoundrels Scattergun" Unique has both kept its Legendary Effect and its Fully Automatic fire mode. It's also has a chance to spawn on a variety of anarchist types, albeit without said Legendary Effect. Per balance.
The "Creeping Death" Unique has had its name changed to "Manhunting Shotgun", lost its Legendary Effect, and made into a visual variant of the base Riot Shotgun.

How to acquire - The Riot Shotgun spawns on Raiders, Gunners, BoS, and rarely on Children of Atom starting at around level 20-40. And rarely on Super Mutants at level 15.
The "Scoundrels Scattergun" rarely spawns on Raiders after level 30 and on Super Mutants after level 40.
The "Manhunting Shotgun" spawns on Raiders, Gunners, BoS, Super Mutants, and rarely on Children of Atom starting at around level 30-50
BoS Weapon Vendors begin selling the Riot/Manhunting Shotgun at level 20, while Caravan, Workshop, Goodneighbor, and Railroad vendors begin selling them at level 30.
The Riot/Manhunting Shotgun can be purchased from the Market Trading Terminal under the Trader "Gunari Mettbach." and the "Scoundrels Scattergun" with its Legendary Effect present, can be purchased from the Trader "Pete the Wheat."
Prices and Trade Skill required to purchase them vary, depending on their rarity.

Install the Main File from their page. Burst-Fire Framework is listed as a requirement, it is NOT needed. As it is open-sourced and I merged the function needed for this mod into my Main File.

Then install my Replacer Patch for it.

City-Killer Shotgun:

Ammo Types - All the 12 gauge variants, typical for a shotgun.

Fire Modes - Semi-Auto and Burst-Fire.

Notes - The Burst Shotgun has been obviously renamed to the "City-Killer Shotgun." Given its origin, inspiration, and the fact that it now also capable of Semi-Automatic fire. Just like it could in Fallout 1/2.
It requires a Base Strength of 4 to use.
This weapon is very likely a flat upgrade to Horizon's Combat Shotgun. As its Burst-Fire is potent, its starting Magazine size is greater and it has more weapon attachments.
Which is likely the intent of the author of this mod, Alexerator.
And that's kept with my patch. With only some adjustments made to various attachments and a 5 point increase to the weapon's base AP Cost per shot.
Its Burst-Fire is somewhat difficult to control though.
Overall, I hope my few changes ensure that it only ends up a slight upgrade over the Combat Shotgun, and other patched modded shotguns, rather than a massive leap ahead of them.

How to acquire - The City-Killer Shotgun spawns on Gunners, BoS members, and Raiders starting between level 24-28. With the Raiders typically having somewhat makeshift looking versions (per the original mod!) of the weapon.
The City-Killer Shotgun can be rarely found first at higher quality Weapon Vendors at level 20, then at lesser stores, at level 30 and 40.
They come in various configurations based on quality of Vendor. Either 'Pristine' or 'Handmade' looking.
The City-Killer Shotgun can be can be purchased from the Market Trading Terminal under the Trader "Gunari Mettbach." 
For a steep price.

X-1 Prototype "Accelerator":

Ammo Types - 2mm Gauss cartridge and all its variants.

Fire Mode - Semi-Auto and Burst-Fire.

Notes - It requires a Base Strength of 5 to use. It's a very interesting 'Unique' for the City-Killer Shotgun. As its not a shotgun, really and is not customizable in the usual sense. As in, you cannot alter its Weapon Attachments at all. Which was the original intent of the mod's author.
One that makes sense. 
I did however, add the ability to Improve the Receiver and add Augments, per Horizon's usual weapons.
I also made it possible to Reverse Engineer it per usual. Albeit, only with a very high skill check.
As a Gauss weapon, with a limited Magazine size of 3 (not unlike many Gauss weapons within Horizon), it having a Burst-Fire mode puts it in a unique position. One that may make this weapon, the best of the bunch, IF it had access to Weapon Attachments.
Since it doesn't, it seems to be in a good place at the moment.

How to acquire - The X-1 Prototype "Accelerator" can be found on high level Railroad Operatives at level 40.
It can also be rarely purchased from the Railroad after level 40.
The X-1 Prototype "Accelerator" can be purchased from the Market Trading Terminal under the Trader "The Railroad", assuming you're a member of that Faction.
It is rather costly, though. As you'd expect.

Install the "Classic Combat Shotgun Updated Anims and Textures" Main File from their page.

AND

Install Super Mutant Equality a Super Mutant Weapon Expansion by Brainstormepilog
My replacer patch adds the MG69 to Super Mutant level list via Horizon's Quest Addon and will cause the mutants to not use the weapon properly. 

Then install my Replacer Patch of it.

Combat Shotgun Mk 1: 

Ammo Types - All 12-gauge shells.

Fire Modes - Semi-Auto and Full Auto.

Notes - That shotty from Fallout 3... Compared to Horizon's Combat Shotgun, this ones main gain is a slightly higher fire rate in full auto and the ability to use essentially a Double Barrel Very Short Barrel attachment. Which increases its Critical Hit Damage but with downsides. It's negatives is that its small and medium Magazines have less capacity. As well as not having any 'Quick' Magazines. 
Overall, its somewhat limited weapon attachments lead this weapon to really live up to its 'Mk 1' status. But adds variety to the Wasteland and nostalgia to us sick, sick folks who actually like its aesthetic/design. :)
The Unique that comes with the Base mod did not make the cut, as ultimately it was a funny meme weapon named "Just The Worst Shotgun" that was anything but and incredible overpowered. 

How to acquire - The Combat Shotgun Mk 1 spawns on Raiders, Gunners, DC Security Guards, Super Mutants, BoS, and Railroad members.
Weapon Vendors from across the Commonwealth begin rarely selling the Mk 1 starting at level 5.
The Combat Shotgun Mk 1 can be purchased from the Market Trading Terminal under the Trader named "Blap Blap Meister."

Install the Main file from their page.

Then install my Replacer Patch of it.

Pipe Carbine: 

Ammo Types - .30, .5.56, and 5.56 APX

Fire Modes - Semi-Auto and Full Auto.

Notes - An incredible made of scrap 'Service Rifle.' I considered reducing its damage but since the Pipe Rifle doesn't, it didn't seem right to do so here. Instead I decided to not grant the Pipe Carbine access to 7.62 rounds. Chiefly because of its Magazine Weapon Attachments, which came in fairly large capacities (20/30/60/100!). That were based off the potential of being chambered in 5.56. 
Its attachments grant it an extra edge in regards to recoil control in comparison to the Pipe Rifle. Though such attachments have a fairly high skill requirements. Otherwise it is pretty comparable to the Pipe Rifle and should add nice early game variety, that has a chance to last longer than you'd expect, thanks to its unique attachments.
I did not convert the 'Nail Gun' Unique to Horizon, sadly. As adding 'Nails' as an ammo would just be irksome, for a singular Unique. Among other things.

How to acquire - The Pipe Carbine spawns in the hands of Children of Atom, Gunners, Raiders, and Railroad Members starting at level 1. It's effectiveness is well liked by the somewhat less equipped denizens of the Wasteland.
Weapon Vendors from across the Commonwealth begin selling the Pipe Carbine at level 1.
The Pipe Carbine can be purchased from the Market Trading Terminal under the Trader "Pete the Wheat."
It can also be crafted at the Weapons Lab for a nominal amount of parts and skill.

Install the Main File from that page.

Then my Patch for it.

Rifle No.9 Mk1 EM 2:

Ammo Types - .30/5.56/7.62/.303

Fire Modes - Semi-Auto and Full Auto.

Notes - This weapon's base stats are based on Horizon's Combat Rifle. That said, I decided to allow this weapon to be shoot .303 British. Which is an ammo type that was unused within Horizon. Its existence inspired me to grant a gun that irl fired .280 British rounds the ability to fire .303, albeit only in semi automatic. Since the .303 is essentially a rarer .308 without speciality ammo types, the fact that the EM 2 can shoot it neither matches reality, nor Horizon's core balance. I did however, make a point to increase the recoil and slow the EM 2's base rate of fire when chambered in .303.
Keep the above in mind when deciding to my patch for this!
Another thing to note about this patch is that I added a base 'Grip' mod and an additional 3 Receivers to match Horizon's balance.
Overall, I'd like to hear people's opinions about this weapon, as the core mod itself doesn't have too many attachments, other than its 'Damage' weapon attachment category that I removed.
I also did not alter the mods quests in any way.
Which does mean that there is guaranteed ways to obtain this weapon, which is not quite Balanced for Horizon.

How to acquire - Other than the this mods Quest, the gun spawns on Gunners, Railroad, and Brother Hood of Steel npcs starting at level 14. Though many of them will be in poor condition.
Railroad and Goodneighbor Weapon Vendors begin selling them at level 15 and 25, respectively.
The EM 2 can be found at the Market Trading Terminal from the "Railroad" Trader, assuming you've joined that faction.

Install the Main File from their page.

AND 

Install Horizon Mod Attach Point Keyword Managerfollowing this instruction:
"The plugin should be loaded after Z_Horizon_DLC_All.esp and before weapon or armour patches."
Thanks again to Sars99 for this mod and everything related to it! 

Then install my Replacer Patch for the Bullpup Scout Rifle.

Bullpup Scout Rifle: 

Ammo Types - 5.56, 7.62, and their speciality rounds.

Fire Modes - Semi-Auto, Full Auto, and Burst Fire.

Notes - A modern yet aesthetically fitting slow firing Assault Rifle. Giving its audio, its looks, and my personal opinion of what this weapon is, I decided to not allow it to chamber .30 carbine. As it seemed like such a low caliber round, and I wanted to differ it from other Combat/Assault Rifle weapons a bit. To that end, I made a point of giving this weapon a Burst Fire option with the hope that it would further enhance its 'tactical' theme. This weapon also sports quite a bit of attachments that ensure that this Bullpup shoots flatly and with little recoil. Making it a potent range weapon. Despite its low rate of fire.
The "Sentinel" Unique has kept its Legendary Effect, albeit its been reduced per Horizon's balance and in a way lost its one of a kind aesthetic. As you can now rarely find normal Bullpup Scout Rifles sporting its camo.
The "Heatseeker" Unique has lost its Legendary Effect but kept all of its high end attachments. It too has lost its one of a kind aesthetic, and Gunners can be found wielding normal variants sporting its camo as well.

How to acquire - The Bullpup Scout Rifle can be found on BoS members and Gunners after level 15.
Weapon Vendors rarely have the rifle in their stocks after level 15 as well. With higher quality Vendors having the best chance to have it.
The Bullpup Scout Rifle and its Uniques can be purchased from the Market Trading Terminal under the Trader named "Gunari Mettbach."
Prices and Trade Skill required to purchase them vary, depending on their rarity.

Install the ESP Main File version of the mod.

Then install my Replacer Patch for it.

Select Assault Rifle:

Ammo Types - .30/5.56/7.62 and their speciality rounds.

Fire Modes - Semi-Auto, Burst Fire and Full Auto

Notes - Its similar to a Combat Rifle but with less rounds in its base magazine and heavier weight.
I notably choose to not to include its .38 or .45 ammo conversions, as the base Combat Rifle ammos make more sense.
But I did adapt the guns burst fire ability. This comes in the form of "Receiver Types," which allow you the ability to switch from semi to burst fire or from semi to automatic fire in the field. However, you can't change Receiver Types on the go, only at a Weapons Workbench.
I didn't alter the base version of this mods weapon attachments, which means that this gun ultimately ends up with slightly superior attachments all around. Like the drum magazine.
This means that this weapon is likely to be a slight upgrade to the Combat Rifle, once you get the right attachments.

How to acquire - Since I removed the original mods means of acquisition (the bunker with the junk Select Assault Rifle) as that isn't easily compatible with Horizon, the gun spawns much like my other weapon patches.
The Select Assault Rifle starts spawning on Gunners, Raiders, Children of Atom, and Brotherhood of Steel members at around level 10-16. 
Weapon Vendors sell this weapon, starting at level 10-30. Depending on which vendors/factions would make the most sense. BoS Weapon Vendors are the earliest to sell it.
The Select Assault Rifle can rarely be found at the Market Trading Terminal by the Trader named "Gunari Mettbach."

Follow the install instructions on that page, ensuring you have all the requirements and then install the Main File.

AND

Install Super Mutant Equality a Super Mutant Weapon Expansion by Brainstormepilog
My replacer patch adds the MG69 to Super Mutant level list via Horizon's Quest Addon and will cause the mutants to not use the weapon properly. 

Then install my Replacer Patch of the MG69.

Foote Light Machine Gun:

Ammo Types - .30/5.56/7.62 and their speciality rounds. The same as Horizon's Light Machine Gun (Vanilla Assault Rifle) 

Fire Modes - Semi-Auto and Full Auto

Notes -  Requires a base Strength of 5 to wield. Just like the base LMG. Which mechanically, it should match pretty much to a tee. Making a nice visual/auditory variant for your playthroughs.

How to acquire - Starts spawning on Gunners, Raiders, Railroad, BoS, and Supermutants starting from level 12-16. Similar to the Light Machine Gun.
Weapon Vendors, specifically Brotherhood of Steel vendors, start selling the Foote LMG at level 15. It starts showing up elsewhere at level 20 onwards, though not at the Workshop Weapon Vendors.
The Foote LMG can be rarely found on the Market Trading Terminal being sold by the Trader named "Pete the Wheat."

Install the Main and Optional File from that page.

Then

Head over to The Colt Monitor 3rd Person Animation Addon with Tactical Reload Support v1.0 by Winterworld19
and download the Vanilla Version of the mod.

*Optionally download the TR Patch Optional File, IF you're using my Tactical Reload Replacer Patch that needs this.

AND 

Install Super Mutant Equality a Super Mutant Weapon Expansion by Brainstormepilog
My replacer patch adds the The Automatic Rifle to Super Mutant level list via Horizon's Quest Addon and will cause the mutants to not use the weapon properly.

AND 

Install Horizon Mod Attach Point Keyword Manager following this instruction:
"The plugin should be loaded after Z_Horizon_DLC_All.esp and before weapon or armour patches."
Thanks again to Sars99 for this mod and everything related to it!

Then install Replacer Patch of The Automatic Rifle.

Automatic Rifle:

Ammo Types - 7.62/.308 and their speciality rounds.

Fire Modes - Semi-Auto and Full Auto.

Notes - Requires a base Strength of 5 to wield. The legendary BAR. Given that irl it has been chambered in 7.62 at least once, I figured this ought to be the base ammo type for this weapon. With the .308 as a potent, single fire only option. I also increased its based damage by 1, though this only applies while its chambered in 7.62.
Which makes this a very potent automatic weapon. But thankfully Dak/Pig, built their mod with that in mind, and balanced it as such. As in full auto, you'll find yourself shooting the sky within 10ish rounds. Something that is alleviated but not completely negated with this weapon's attachments.
I did increase the weapons base AP cost by 5 to somewhat ensure that that players can't just use VATS to counteract the weapons wild recoil.
The "Bootlegger" variant of the gun is still a Unique and one that has kept its Legendary Effect. Though, per Horizon, its already nerfed. The Lucky Charm that also comes with this variant had its effect removed, for balance.
The "Green Meanie" has now been renamed to be the "BAR" and made into a simple cosmetic variant, meant for Gunners. Meaning it has no Legendary Effects.
The "Greased Lighting" variant is also a Unique that kept its Legendary Effect, but again reduced already by base Horizon. I replaced its Rapid Receiver with a Hair Trigger Receiver but kept its Muzzle Booster attached. Making this variant a pretty potent one. If you can handle the recoil.

How to acquire - The Automatic Rifle can be found on Gunners, Raiders, Railroad, Triggermen, Super Mutants, and BoS members from level 10-20. 
While the "BAR" (Green Meanie), variant starts showing up on Gunners at level 10-15. Though mostly on Gunner Bosses at first. Then starting to show up on more regular troops later on.
Weapon Vendors from BoS, Caravan, Railroad, and Goodneighbor start selling this weapon at level 10-15. While the "BAR" variant is sold by Caravan and BoS Weapon Vendors at level 25. 
The Automatic Rifle and all its variants can be found at the Market Trading Terminal. With the base version and the "BAR" ("Green Meanie") being sold by the Trader named "Gunari Mettbach." While the "Bootlegger" variant is sold by the Trader named "Blap Blap Meister" and "Greased Lightning" sold by "Pete the Wheat."
Prices and Trade Skill required to purchase them vary, depending on their rarity.

Install the Main File only.

Then install my Replacer Patch for it.

Assault LMG

Ammo Types - .30/5.56/7.62 and their speciality rounds. The same as Horizon's Light Machine Gun (Vanilla Assault Rifle) 

Fire Modes - Semi-Auto and Full Auto

Notes - Requires a base Strength of 5. In many ways acts very similarly as Horizon's Light Machine Gun. Except it has more weapon attachments/mods and can gain larger Magazine sizes. As well as a functioning flashlight!
Which means for balance, it'll spawn later than the Horizon's LMG and be rarer sight. As well as being slightly heavier overall.
I did remove it's odd 'Link Ammo' as I'm not sure what that was, its purpose and wasn't keen on trying to merge that feature into my Hz patch.

How to acquire - Starts spawning on Gunners, Raiders, Railroad, BoS, and Supermutants starting from level 16-30. Similar to the Light Machine Gun.
Its Placed "Unique" weapon in the "Gunner's Plaza" still exists but is no longer a Legendary Weapon and simply has good attachments.
I kept it because its location is rather dangerous and I was simply fond of that and its lore friendly sort of aesthetic. I also felt that the author spent time on it and I'd hate to remove it. Consider it a good reward for fighting through a horde of Gunner's. (Let me know how you feel about this!)
Weapon Vendors, specifically Brotherhood of Steel vendors, start selling the Assault LMG at level 20. It starts showing up elsewhere at level 30 onwards, though not at the Workshop Weapon Vendors.
The Assault LMG can be rarely found on the Market Trading Terminal being sold by the Trader named "Gunari Mettbach."

Install the Main File found on their page.

Then install my Replacer Patch of it.

Homestead Carbine:

Ammo Types - 9mm, .45 and its speciality rounds.

Fire Modes - Semi-Auto only.

Notes - An early game semi-auto Combat Rifle. The obvious change to this weapon is that I added the ability to chamber .45 rounds, per DegenerateDaks wishes in his video about this weapon. And frankly because it made sense.
The other change is that I increased its Base Damage by 1. To reflect that it is after all a rifle shooting pistol caliber rounds. I may change this in the future if I get feedback on it or if my thoughts change for the weapon. 
Otherwise this is truly just a solid low capacity (its highest Magazine size is 10) early game Combat Rifle. With fairly low recoil overall.

How to acquire - The Homestead Carbine starts spawning on Raiders, Gunners, and Railroad members at around levels 3-5. With the Gunners usually sporting versions chambered in .45. 
Weapon Vendors around the Commonwealth begin having a chance to have the Homestead Carbine in stock after level 3.
The Homestead Carbine can be purchased from the Market Trading Terminal being sold by the Trader named "Gunari Mettbach.

Issues - The gun does have a weapon firing bug that can cause it to essentially fire 2 shots in very, very quick succession. This is an issue with the weapons animations and unrelated to my patch.

Install the Main File found on that page.

Then install my Replacer Patch for it.

.30 Carbine (Formerly the .22 Carbine)

Ammo Types - .30 caliber.

Fire Modes - Semi-Auto only.

Notes - There's an obvious change. One I did since Horizon currently doesn't have a .22 caliber. As it was replaced by the .30 caliber, which is probably because it's far more broadly applicable to weapons in the base game. So, I too changed the fairly memorable .22 Carbine into a .30 Carbine. As I also didn't want to add such an even weaker caliber ammo type into the game, one that might only be useful for a singular gun.
Otherwise, this weapon has no other meaningful change. It's still weak as hell but there for you in the early game.
The "Insecticide" Unique kept its Legendary Effect but its reduced to 10% from 50% per Horizon's balance. As well as all of its attachments. Ultimately, I figured  a gun shooting one of the weakest calibers in Horizon, might as well keep its Legendary Effect. Right?
Let me know how you feel about these changes and its balance. 

How to acquire - The .30 Carbine can be found on low level Raiders from level 1. 
Weapons Vendors from Diamond City, Caravans and Workshop at level 1.
The .30 Carbine can be found being sold on the Market Trading Terminal under the Trader named "Marty." And the "Insecticide" variant being sold by "Pete the Wheat."
Prices and Trade Skill required to purchase them vary, depending on their rarity.

Caravan Carbine:

Ammo Type - .357/.44 and their speciality rounds.

Fire Modes - Semi-Auto only.

Notes - I thought about allowing it to use 45.70 ammo just like the Lever Action Rifle, but given its look and what it was based off of irl. I figured it'd make more sense not do to so. It's weapon attachments do give the Caravan Carbine a bit of an edge, both in magazine size and reload speed. Given that it should provide a solid, albeit less potent alternative to the Lever-action Rifle. 
The "Valkyrie" Unique lost its Legendary Effect, but is otherwise unchanged.

How to acquire - The Caravan Carbine spawns on Raiders, Gunners and Railroad members starting at level 5. 
Weapon Vendors from just about every begin selling this weapon at level 10-15. As it's is meant to a be a 'classic'.
The Caravan Carbine and its Unique, the "Valkyrie" can be found at the Market Trading Terminal under the Trader "Gunari Mettbach."
Prices and Trade Skill required to purchase them vary, depending on their rarity.

Install the Main File from their page.

AND 

Install Super Mutant Equality a Super Mutant Weapon Expansion by Brainstormepilog
My replacer patch adds the Carbine Carbine to Super Mutant level list via Horizon's Quest Addon and will cause the mutants to not use the weapon properly.

AND 

Install Horizon Mod Attach Point Keyword Manager following this instruction:
"The plugin should be loaded after Z_Horizon_DLC_All.esp and before weapon or armour patches."
Thanks again to Sars99 for this mod and everything related to it!

Then install Replacer Patch of the Cowboy Carbine.

Cowboy Carbine:  

Ammo Types - .357.

Fire Modes - Semi-Auto only.

Notes - A fantastic carbine that does the cowboy theme super well. Its limitation to singular ammo type obviously limits its ability to deal with every kind of enemy. But Raiders have plenty to fear from it. To that end I decided to give a +3 to its Base Damage to give it an edge against similar more weapons with a more varied payload. Its rapid fire and accuracy should keep it in a solid spot within Horizon's ecosystem.
"The Long Arm" Unique is still that, and has kept its Legendary Effect. Though its reduced by half, it's still a very potent Effect against Raiders/Triggermen. It also sports a unique non-Modular Long Scope that has less of an Increased VATS Cost, while attached. 
The "Hurt Me Plenty" Unique is more of a visual variant, as its lost its Legendary Effect but always comes with a Unique/non-craftable accessory that increases Bash damage by a huge percentage. 

How to acquire - The Cowboy Carbine spawns on Raiders, Gunners, Super Mutants, and Railroad members after level 5-onward.
Weapon Vendors from around the Commonwealth have a chance to have the Cowboy Carbine in stock starting at level 10.
The Cowboy Carbine, "Hurt Me Plenty", and "The Long Arm" can be purchased from the Market Trading Terminal under the Traders "Pete the Wheat" and "Gunari Mettbach." With the first two found on the first Trader mentioned and "The Long Arm" on the later.
Prices and Trade Skill required to purchase them vary, depending on their rarity.

The Trench Cleaner:

Ammo Types - .357.

Fire Modes - Semi-Auto and Full Auto.

Notes - A fully automatic capable version of the Cowboy Carbine. Very potent, and as such, does NOT receive the Cowboy Carbine's increased Base Damage. And it has lost its Legendary Effect.
Which hopefully gives y'all some reason to continue to use the Cowboy Carbine, after getting this Full-Auto variant.

How to acquire - The Trench Cleaner spawns on Raiders, Gunners, Super Mutants and Railroad members after level 5-15. Varying on Factions and usually only in its semi-auto configuration during those early levels.
Weapon Vendors can be found more rarely and usually only on high quality Weapon Vendors, selling this weapon after level 15.
The Trench Cleaner can be purchased from the Market Trading Terminal under the Trader "Blap Blap Meister."

Install the Main File from their page.

AND

Install Horizon Mod Attach Point Keyword Manager following this instruction:
"The plugin should be loaded after Z_Horizon_DLC_All.esp and before weapon or armour patches."
Thanks again to Sars99 for this mod and everything related to it!

Then install Replacer Patch of the Vintage Repeater.

Vintage Repeater:

Ammo Types - .357, .44, and their speciality rounds.

Fire Modes - Semi-Auto only.

Notes - The classic Fallout 3 Lever Action is back, thanks to Dak & Pig. The main thing I changed was increasing its Base Damage by 3. To ensure that this rifle feels like the crème de la crème of .357 and .44 magnum weapons. It is THE classic lever action after all.
Otherwise, it's just a solid rifle with good attachments that can really make the rifle shine. 
The "Quick Silver" Unique has now been made a visual variant. While "The Final Breath" Unique is mechanically unchanged and still retains its Unique to this mod, Legendary Effect. For that reason, you're not able to Reverse Engineer this Unique.

How to acquire - The Vintage Repeater spawns on Raiders, Gunners, and Railroad members starting at level 5. 
While the "Quick Silver" variant, can rarely be found on Gunner Bosses and sometimes found on Railroad members starting at level 10.
Weapon Vendors around the Commonwealth start selling the Vintage Repeater at level 10. While "The Final Breath" can sometimes be found on the Caravan Trader named "Cricket" after level 20.
The Vintage Repeater and the "Quick Silver" variant can be purchased at the Market Trading Terminal under the Traders "Gunari Mettbach" & "Pete the Wheat" respectively.
Prices and Trade Skill required to purchase them vary, depending on their rarity.

Install the Main File found on their page. But be sure to haveVintage Repeater (Winchester 1866 Henry 1860) and my Hz Patch of it also installed, as well as all of its requirements.

Then install my Replacer Patch of the Lever-Action Carbine.

Lever-Action Carbine:

Ammo Types - 10mm and 10mm Cryo.

Fire Modes - Semi-Auto only.

Notes- That odd gun from Far Harbour returns beautifully thanks to Alexrator and its still only a 10mm gun. Given its game history and it simply being a less powerful variant of the Vintage Repeater.
I didn't change much. Other than giving it a +3 to its Base Damage. As it is a long arm shooting a pistol caliber. It ought to have some punch.
It also has a lower Action Point cost per VATS attack. That being 20 compared to the Vintage Repeater's 26.
I considered trying to give this gun an increased ammo capacity compared to the Vintage Repeater, but since it is a rounds reloading type gun, that would require separate reload animations. So, I didn't.

How to acquire - The Lever-Action Carbine on Raiders, Gunners, and Railroad members starting at level 5. Though it should be a rarer sight on Gunners, as its considered inferior to the Vintage Repeaters. (My head cannon)
Weapon Vendors around the Commonwealth start selling the Lever-Action Carbine at level 5.
The Lever-Action Carbine can be purchased at the Market Trading Terminal under the Trader "Pete the Wheat."

Lincoln's Repeater:

Ammo Type - .357, .44, and all its speciality ammos.

Fire Mode - Semi-Auto only.

Notes - The obvious one is that I renamed it from "That Repeater" to "Lincoln's Repeater." It does not have a mechanical Legendary Effect, but it does have the same AP cost as the Lever-Action Repeater despite otherwise just a fancy looking Vintage Repeater that comes with good attachments.
Thus, it is ultimately a slightly better Vintage Repeater that you can still craft with just like that gun. 
Given its history in the game world and for fans, I don't think its the worst thing to be just a better version.
I did decide not to alter how you get this weapon, as the base mods little quest sets itself up to be lore-ish friendly yet simple. Ultimately it'll take some amount of traveling about the Commonwealth to get.

How to acquire - The same as the base mod. For hints, seek out the Lever Action mods Main Page and the "Unique's Location" tab.

Install the Main File from their page.

AND

Install Horizon Mod Attach Point Keyword Manager following this instruction:"The plugin should be loaded after Z_Horizon_DLC_All.esp and before weapon or armour patches."
Thanks again to Sars99 for this mod and everything related to it!
Then install my Replacer Patch of the Rolling Block Rifle.

Rolling Block Rifle:

Ammo Types - .45-70 and .45-70 ECA.

Fire Modes - Semi-Auto only.

Notes - Pretty much the bigger brother to the Marksmen Pistol. A classic single shot .45-70 that does as well as you'd expect. An excellent sniper with more weapon attachments than the Pistol version. Given the retro feeling this weapon mods Scopes give, I decided not to adapt any of them to the "Modular Scopes" system of Horizon. Instead keeping them Vanilla in that way. Which helps set this weapon as an early game Sniper.
I added a "Tuned Receiver" which gives an increased Reload Speed and reduced VATS Cost. Which paired with the mods "Internals" weapon attachment slots,  its own "Tuned" variant and, the "Gunslinger Stock" leads to very fast Reload Speed. Possibly too fast. Let me know!
"The Sharpshooter" Unique has kept its Legendary Effect and is otherwise unchanged.

How to acquire - At level 7, the Rolling Block Rifle can be found in the hands of Raiders, Gunners, and Railroad members, with the latter two, it'll be exclusively found on Snipers.
Weapon Vendors begin selling the Rolling Block Rifle at around level 10. "The Sharpshooter" Unique has a chance to be found being sold by the Caravan Trader named "Cricket" at around level 15.
The Rolling Block Rifle can be purchased from the Market Trading Terminal under the Trader named "Pete the Wheat."

Install the Main Non-Munitions File from their page. 

Then install my Replacer Patch for it.

Slug Gun: 

Ammo Types - .357, .44, .45-70, and their speciality rounds.

Fire Modes - Semi-Auto only.

Notes - A fun pump-action alternative to the Lever-Action Rifle, one that has far more attachments and is a touch faster said rifle. It does have slightly reduced range at its base, though again, its attachments lead it to being a superior Lever-Action Rifle in the long run. 

How to acquire - The Slug Gun spawns on Gunners, Raiders, and Railroad members after level 8.
Weapon Vendors from across the Commonwealth have an uncommon chance to sell the Slug Gun after level 8 as well.
The Slug Gun can be purchased from the Market Trading Terminal under the Trader "Pete the Wheat."

Install the Main File from their page. You may install the Optional Texture pack. It'll work fine with my patch. The ammunition Optional File is untested.

Afterwards, disable the mods TrailCarbine.esl

Then install my Replacer Patch of the mod.

Trail Carbine:

Ammo Type - .357, .44, .45-70 and their speciality rounds.

Fire Modes - Semi-auto only.

Notes - A FNV classic. One that of course, was chambered in .44 in that game. I considered keeping it that way, or otherwise not allow it to chamber .45-70. But the existence of both an irl variant of this gun (the gun is clearly based off/inspired by the Marlin's lever action) and the original mods Unique. I decided to just give it the same ammo set as Horizon's Lever-action. 
The reason I was hesitant was simply because the Trail Carbine is pretty much just better right out the gate. Thanks to having 4 extra rounds in its tube. Thankfully after taking a closer look it seems that such a difference doesn't stay true once you start modding both guns.
As the Trail Carbine does not have Stock or Muzzle Attachments. Balancing the gun somewhat. I furthered that by making it heavier.
The "Mare's Leg" has been made a variant of the Trail Carbine. One that more closely matches the Lever-action Rifle. As it has the same weight and round capacity. To make this variant a little bit more appealing, I reduced its AP cost by 5. Putting pretty close to a pistols AP cost.

How to acquire - The Trail Carbine can be found on Raiders, Gunners, and Railroad members starting between level 10-15.
While its variant the "Mare's Leg" starts spawning on Raiders, Gunners, and Railroad members between level 15-20.
Weapon Vendors around the Commonwealth begin selling both the Trail Carbine and the "Mare's Leg" at level 15. The chance they have it in stock, depend on the vendors.
The Trail Carbine and the "Mare's Leg" can be found at the Market Trading Terminal under the Trader "Gunari Mettbach" and "Pete the Wheat" respectively.
Prices and Trade Skill required to purchase them vary, depending on their rarity.

Install the Main File from their page. 

Then disable/delete/hide the CWHuntingRifle.esl that comes with it.

Then install my Replacer Patch for the mod.
Know that I built my Replacer Patch while using Capital Wasteland Hunting Rifle - Unofficial Update by codeblackcrash (give Code some love for all their hard work!) as a reference. I of course deviated and mostly carried over their fixes and such. (No Munitions stuff obviously!)

Also, highly consider using CW Hunting Rifle Animation Tweak by Diakyuto. It works out of the box (it's just meshes) and is fantastic!

Scavenged Hunting Rifle: 

Ammo Types - 5.56, 7.62, .308, and their speciality rounds.

Fire Modes - Semi-Auto only.

Notes - Renamed to avoid confusing it with FO4's Hunting Rifle and because of its aesthetic. Because of its name, its history of weirdly using .32 in FO3 and how it looks. I didn't want to give it access to .50 caliber rounds. Thankfully, Horizon already has a Hunting Rifle type of gun that does just that. So, I went with that and it seems fitting. This means that the Scavenged Hunting Rifle falls somewhere between the normal Hunting Rifle and the Custom Sniper Rifle in how it mechanically functions. With some differences. That being its lack of access to Medium Magazines, and having 2 less rounds in the mag than the Hunting Rifle's Large Magazine. However, the Scavenged Hunting Rifle, despite having an ever slightly slower fire rate, does have a 1 second faster Reload animation. 
Overall, it's another solid Hunting Rifle you can use, whilst remembering the good old times in previous games.
The "Paciencia" Unique is still very much a Unique with the "Lucky" Legendary Effect (Per the Unofficial Patches wise suggestion) and its unique stock that acts as a Marksmen's Stock + (again per the Unofficial Patches suggestion). The "Paciencia" also boosts a +1 to its Base Damage, a faster Rate of Fire, and better Critical Hit Multiplier (similar to a Revolver). However, you cannot alter its Stock (idk why you would) nor its Magazine (which deviates from the Unofficial Patch and somewhat matches its FNV low Magazine size). As I wanted to keep it's Unique aesthetics and similar noteworthy differences that it had in FNV. 
Overall the "Paciencia" will likely be one of the strongest .308 Sniper Rifles in the game. (Be warned and let me know what you think!)

How to acquire - The Scavenged Hunting Rifle spawns on Children of Atom, DC Security Guards, Gunners, Raiders, and Railroad Members starting at level 3. Short versions of the weapon can be rarely found in Safes starting at level 1.
Weapon Vendors from across the Commonwealth sell the weapon starting at level 1.
The Scavenged Hunting Rifle and "Paciencia" can be purchased from the Market Trading Terminal under the Trader "Pete the Wheat."
With "Paciencia" being quite expensive. (Half the cost of buying it in FNV, per my perceived bottlecap economy)
The Scavenged Hunting Rifle can also be crafted at the Weapons Lab. Requiring the same materials but slightly less Skill, than the Custom Bolt-Rifle or Custom Sniper Rifle.

Install the Main File from their Page.

Then install my Replacer Patch for it.

Vintage Revolver Rifle: 

Ammo Types - 7.62, .308, and their speciality rounds.

Fire Modes - Semi-Auto only.

Notes - A really cool weapon, one that sates Revolver fans and those who've always tried to snipe with one in Fallout. It features an increased Base Damage of 1, to somewhat balance its limited Magazine Capacity. It notably has a shorter range than most other 7.62/.308 capable sniper rifle types, BUT has good short range Weapon Attachments and the ability to gain a Double Action Receiver. Which removes its hammer cocking and essentially turns it from a bolt-action rifle type to a semi-auto rifle. Though with its notable recoil, it can be very hard to manage outside of point-blank range. Because it is a Revolver, I deigned to give it the same 1.5 Critical Damage Bonus of Horizon's base Revolver. Which helps this weapon in the long run.
Lastly, it's Ammo Types were going to be Revolver based, but after seeing it in action, its audio, its reload animation (which seems to feature .308 rounds) I decided to limit it to 7.62/.308. I think it works out well and offers a nice alternative for Revolver fans, to not end up too narrow in their choice of ammo or the amount they have.
The "Impaciencia" Unique is still a Unique that has kept its Legendary Effect, albeit nerfed per Horizon, and has kept its Unique Stock. Which is ever so slightly better than a Recoil Compensating Stock.

How to acquire - The Vintage Revolver Rifle spawns on Children of Atom, Gunner Conscripts, and Raiders after level 8.
Weapon Vendors from across the Commonwealth can very rarely have the weapon in stock after level 8 as well.
The Vintage Revolver and the "Impaciencia" Unique can be purchased from the Market Trading Terminal under the Trader named "Pete the Wheat."

Install the Main File from their page.

Then install my Replacer Patch for it.

Springfield Rifle: 

Ammo Types - 7.62, .308, and their speciality rounds.

Fire Modes - Semi-Auto only.

Notes - Renamed to what its commonly known as. Wanting to differ this rifle from the Horizon's Hunting Rifle more, I gave it access only to 7.62 and .308 rounds. And granted it a +2 Base Damage to ensure that it's a high damaging Sniper Rifle. Giving its limited 5 round clip, I also wanted to give its high end weapon attachments a little bit extra oomph. With its Marksmen Stock being just a touch better all around than other bolt-action rifle's versions of it. It also has access to a variety of Suppressors that allow you to have low-end, range inhibiting versions to higher end ones that further Reduce Recoil.
One thing to note that when a Scope is attached the Reload slows down drastically, as BCR is then enabled and causes the weapon to load one round at a time.
Ultimately, the Springfield Rifle should feel like an excellent Sniper Rifle that gets better as you level up.
The "Helmet Popper" Unique still has its Legendary Effect, albeit lessened per Horizon's balance, and access to a visually different but mechanically similar Veteran's Stock.

How to acquire - The Springfield Rifle spawns on Gunner Bosses/Snipers, Raiders, Triggermen Snipers, BoS, and Railroad Snipers at level 10.
Weapon Vendors from across the Commonwealth have a rare chance to have the Springfield Rifle in their stock. With higher quality Weapon Vendors selling slightly more often.
The Springfield Rifle and the "Helmet Popper" can be purchased from the Market Trading Terminal after under the Trader named "Gunari Mettbach."
Prices and Trade Skill required to purchase them vary, depending on their rarity.

Install the Main File from their page.

Then install my Replacer Patch for it.

European Sniper Rifle:

Ammo Types - 7.62, .308, and their speciality rounds.

Fire Modes - Semi-Auto only.

Notes -  A legendary rifle. The FR R2 (European Sniper Rifle) balances pretty well against the Horizon's Hunting Rifle. Its base and max Magazine Capacity being quite a bit larger, would seem to give it an overwhelming advantage. But its balanced by it slower fire rate and being limited to 7.62 and .308. Which I did to balance it and because of its history. Because of that I did increase its Base Damage by 1. Which isn't much for a slow bolt action rifle, but it is something. Overall, it should feel like a solid Sniper Rifle, that should work just fine at any stage of the game.
The "Fait Accompli" Unique still has its Legendary Effect, though dampened per Horizon's Balance and all its high end attachments. Including a rare non-craftable suppressed barrel.
The "Croque Monsieur" Unique has also kept its Legendary Effect, though it is notably weaker due to Horizon's Balance. Thankfully it has a Unique slightly superior Muzzle Brake attachment on top of its high end weapon mods.

How to acquire - The European Sniper Rifle can be found in the hands of Gunners Snipers/Riflemen, BoS, and Railroad Snipers starting from level 12. 
Weapon Vendors from across the Commonwealth rarely have the rifle in their stocks also starting from level 12.
The European Sniper Rifle and its Uniques cane be purchased from the Market Trading Terminal under the Trader named "Gunari Mettbach."

Install the Main File from their page.

Then install my Replacer Patch for it.

Bullpup Sniper Rifle: 

Ammo Types - 7.62, .308, and their speciality rounds. 

Fire Modes - Semi-Auto only.

Notes - Ahh that classic Hitman Sniper Rifle. Fantastically recreated for Fallout 4. Given its legendary lore, high quality construction and rarity, I decided to lean into it being a top-end Sniper Rifle. Which is why I gave it a +2 to its Base Damage. As well as increasing its Barrels and Stocks mechanical benefits to be slightly better than their peers. The fact that it isn't bolt-action and has Magazine options, further increase its lead above say the Hunting Rifle.  Though its limited Ammo Types and heavier weight do come into play and somewhat should balance the rifle out a bit. 

How to acquire - Gunner Bosses have a chance to wield this rare, rare rifle after level 47.
High tiered/quality Weapon Vendors have a very slim chance of having the Bullpup Sniper Rifle in stock after level 30.
The Bullpup Sniper Rifle can be purchased from the Market Trading Terminal under the Trader "Gunari Mettbach" for a massive sum of caps and needing a Very High Trading Skill to even be allowed to purchase it.
Finally you may head over to the base mod's page to find into about where you can find the Bullpup Sniper Rifle. Though, I'd suggest not doing so, if only to treasure the moment when you do acquire it. But you do you boo.
This weapon is likely the most rare & difficult to acquire non-unique I've added so far. And that's because of the weapon's irl lore and the mod authors intent for it to be essentially a "Unique." However, not wanting to be too limiting, I obviously made it slightly more obtainable, though very expensive and rare.

Install the Main File from that page.

Then install my Patch of that mod.

Laser Garand:

Ammo Types - Fusion Cells and all its variants.

Fire Modes - Semi-Auto, Beam Splitter (Laser Shotgun), and Full Auto.

Notes - A very interesting gun, that due to its mixing of ballistic and laser mods, makes this a somewhat difficult to balance weapon. I tried to find a middle ground damage wise between a laser gun and the guns original damage. Its attachments, mainly in clip capacity is what ultimately puts this weapon above the normal laser gun.

How to acquire - The Laser Garand can be spawned in the hands of Gunners, BoS, Railroad, and Children of Atom members starting from level 12.
Weapon Vendors from the Brotherhood of Steel and Railroad start selling this gun at level 5, at level 15 for Goodneighbor and Caravan, and level 25 for Diamond City to begin selling it.
The Laser Garand can be found at the Market Trading Terminal being sold by the Trader known as "Pete the Wheat."

Install the Main File from their page.

AND 

Install Horizon Mod Attach Point Keyword Manager following this instruction
"The plugin should be loaded after Z_Horizon_DLC_All.esp and before weapon or armour patches."
Thanks again toSars99 for this mod and everything related to it!

Then install my Replacer Patch of it.

(This is my first mod using RobCo Patcher to add newly created Ammos into various Horizon level list. I've not fully tested if it works, so I figure I'd forewarn you. The worst that could happen is that it somehow spawns too frequently. In such a case, thanks to RobCo Patcher, you can simply remove the "Dak20mm.esp.ini" that comes with this patch. With no further consequence. Then tell me and I'll try to fix it and release a new patch. Which you can download and try out.)

Anti Power Armor Rifle:

Ammo Types - 14.5mm, 20mm, and API /HE versions of both calibers.

Fire Modes - Semi-Auto only.

Notes - Requires a Base Strength of 7 to wield. A massive gun. One I decided to go wild with and introduce two whole ammo types for. As I believe none of the calibers currently within Fallout 4/Horizon fits this weapon. 
With these two new Ammo Types, which are essentially ++ versions of .50 caliber rounds. It should punch through armor pretty well. And easily one shot weaker foes. As the base damage for the 14.5mm and 20mm is 102 and 140, respectively. 
Given its power, Dak and Pig wisely made plenty of drawbacks to this weapon. Like its absurd weight.  As a nearly fully geared, version of the rifle with a Heavy Receiver weighs about 51 pounds. 
As well as its limit to one round per shot and overall slow reload speeds. 
Its varied weapon attachments do help it out a bit. Allowing you to mod its Bold, change its foregrip, and add a bipod/carry handle. All of which increase the usability/viability of this weapon.
Really, outside of the Receivers, which I limited to Standard, Light/Heavy Frame, and Calibrated Receivers. As there is no other Base Receiver that I could conjure that didn't increase fire rate, reload speed, or damage. Non of which would be too balanced given everything already going on for this weapon.
Its Unique, "The Headhunter" still has its Legendary Effect, though its been nerfed per Horizon's balance.

How to acquire -The Anti Power Armor Rifle first has a chance to spawn on Gunner Bosses after level 30. Then on Gunner, Raiders, and Railroad member Snipers after level 40.
The Anti Power Armor Rifle can be crafted at the Weapons Lab. Though fairly high Skill and crafting materials are required to do so.
A few Weapon Vendors, usually Higher 'Tiered' or well stocked, may rarely have this rifle in stock. (Railroad and Cricket have the highest chance)
The Anti Power Armor Rifle can be purchased from the Market Trading Terminal under the Trader "Pete the Wheat."
While "The Headhunter" is located in the same place as in the base mod. In the hands of a Raider Boss within the Glowing Sea. 
I decided given the challenge of this enemy and the fact that the rifle spawns in imperfect Condition, it made sense to forward the means of acquisition from the base mod. Look at the base mods Main Page for more accurate description of where you can find "The Headhunter."

Issues - The base mod has various animation limitations. Which I can't fix. It also seems to have an audio bug, in which its weapon sound while in the hands of NPC's sound like a combat rifle when fired. I'm unsure if that's a base mod issue or something with my patch.

New Ammos:

14.5mm and 20mm - Both are upscaled versions of .50 caliber rounds. Meaning they have greater damage and increased base Armor Piercing. 

How to acquire - Both calibers can be found rarely (hopefully!) in various high quality ammo boxes/containers.
The more sure fire way is to find them being sold in packs of 25 by high quality Weapon Vendors within the Commonwealth. 
They can also be purchased from the Market Trading Terminal under the Trader "Pete the Wheat."
Prices vary between the two and have extra costs when purchased from the Market Trading Terminal.
You can also craft both the basic rounds and speciality rounds, per usual. Though the crafting materials and Skill needed to do so, are increased in comparison to crafting .50 rounds.

This mod and older the Wattz 3000 (Legacy) should work fine together. And (Horizon) patches of said Legacy mod should also function alongside this mod just fine!

Install the Main File and Update File from their page.

You may also install any of the Optional Files from their page as well. They should work!

Then install my Replacer Patch for it.

Wattz 3000:

Ammo Types - Fusion Cells, Heavy Fusion Cells, and Heavy Fusion Cells (MX). This is done through weapon Barrels!

Fire Modes - Semi-Auto, Full Auto, and Splitter (Shotgun).

Notes - The Wattz 3000 deals an additional +3 Base Damage. To implicate its power and to downplay some of its restrictions. As the base mod has incredible visuals, both in barrels and an ammo counter, but both do not play nice with Horizon's Ammo/Fire Modes. As various fire modes would look odd on some barrels, but fine on others. And various ammos reduce ammo count, which bugs out the Ammo Counter. (There may be a means to alter this but I'm not aware of it). Either one of those issues are reason enough for me to take the drastic approach. Which is in a way to return to Vanilla Fallout 4's approach, but with a Horizon twist. 

Instead of Fire Modes. You can swap between different Barrel Types. Each tied to a specific Fire Mode. So when you swap Fire Modes you're actually swapping between Semi-Automatic Barrels and Automatic Barrels. You then have swap to a barrel of that type to see the various Ammunition to begin seeing the full Customization available to said Barrel Type. 
In order to switch from Semi-Automatic Barrels to Automatic Barrels you have to set your Ammo Type to either Electron Charge Cells or normal Fusion Cells.
(I know this is irksome but for balance sake and to avoid you gaining the ability to shoot in full auto Heavy Fusion Cells (MX) with a 26-shot barrel, this is the only way I can figure how to do it. My apologies!)

Three barrel representing the common Laser Gun's three Fire Modes Short Barrel (Semi), Combat Barrel (Auto), and Tri-Beam Barrel (Splitter) can be freely swapped to regardless of if you've crafted said barrels at a Workbench.
While the other barrels all need to be crafted and their Misc Mods kept on your person to be swapped to. An annoyance, I know, but one I hope that is alleviated by the ability to swap barrels on the fly and each barrels power. Ranging from simple stat increases over a basic Laser Gun's barrels, to the ability to use Higher Powered Fusion Cells without a reduction in Ammo Capacity. 
However, most of the more advanced Barrels have a very high skill/crafting requirements in order to be crafted. But, because of all these restrictions tend to be flat out better than other Laser Gun counterparts in various ways. 
My head-cannon is that the Wattz 3000 specifically was made with barrel swapping in mind, and thus the ability to hot-swap with relative ease in the field. You know, high tech weapons and all that. 
Also, the Life Detecting Scopes have been left unchanged as their unique ability seemed interesting.

All in all, the Wattz 3000 will likely be straight up more powerful than any of Laser Gun's available to you but obviously being less versatile overall, despite the barrel swapping mechanic. Please let me know how this balances out and how you feel about these mechanics!

All of the weapons Uniques have kept their Legendary Effects, though many have had them reduced per Horizon's balance. But all of them are pretty powerful. I'd say more but I do like how the base mod implemented them into the world. 
Speaking of that, I have changed almost nothing about the base mods Quest and World Edits, as frankly they are well done and I fear that I'd foul something up if I just started removing things.
Most of it is lore-ish friendly with a meme edge to it, but some are more obvious in their references. Ultimately, I liked what I saw and kept it.

How to acquire - The Wattz 3000 can be found on Gunner Bosses after level 30. And on BoS members after level 45.
High Tier Weapon Vendors have a very slim chance to have the Wattz 3000 in their stock after level 30. With the BoS Traders having a slightly higher chance to have it in stock.
The Wattz 3000 Can be Purchased from the Market Trading Terminal from the Trader named "Gunari Mettbach" for a tidy sum and needing a high Trading Skill to boot.
The price and rarity of the Wattz 3000 is intended by the author, Deadpool2099 and I agree with their intent in this regard.
The Uniques of this mod are all found in the same places as the base mod, and if you want more information, you may seek the base mod's page for some hints, or just Google them, as I did whilst making this mod. However, I'd recommend just finding them naturally. As it'll pseduo help with balance and just be more fun IMO.

Final Notes - Giving how many patches there are for the first Wattz 3000 iteration, I except they'll be plenty for this mod. And I wish them well, giving some of the limitations and difficulties I had in making this patch. But I expect other patches will likely do a better job at being truly balance for Horizon and likely making use of Horizon's base Ammo Types/Fire Modes. So, keep that in mind!

Issues - If you installed version 1.0 AND have a broken Wattz 3000 (Uniques included), you'll need to get your hands on a new version of the weapon. Either through purchasing, finding, or Reverse Engineering one. OR type "help apack_WeaponWattzLaser" into the Console, then type "player.additem xx0092D6" for a replacement Wattz 3000. Replacing those numbers with whatever variant you need to replace.
My apologies for the somewhat irksome

Install the Main File from their page.

Then install my Replacer Patch for it.

Shoulder Mounted Machine Gun:

Ammo Types - 10mm.

Fire Modes - Full Auto.

Notes - Requires a base Strength of 4. A fantastic weapon that I tried to keep as close to Spadey01's vision and FNV's balance. That being a weapon that works great against unarmored enemies but struggles somewhat against heavier armored enemies. Which allows the Minigun to still have a place, given its various ammos. Which is something the base SMMG does not have access to. For balance reasons. Nor does it have Receivers anymore, per Heavy Weapons in general.
I also adjusted various stats to make this weapon, a little bit more difficult to control as well. But I also gave this weapon +3 Base Damage.
This damage increase was somewhat done to match FNV's idea of the SMMG being the hardest hitting per round 10mm weapon and to give it a little umph against its variants, which I'll discuss in a bit.
As well as its lack of Ammo Types. Which largely do to how speciality ammos outside of 5mm, are all Semi-Auto only and most wouldn't really making too much sense, without stepping on various other weapons shoes. Also, there are Uniques of this weapon which do operate differently.
I also nerfed this gun and its variants built in Recoil Reductions to match the Minigun a bit better. However, this has led the weapon to become a touch inaccurate from my testing and certainly difficult to manage. But, I don't think this is a bad thing necessarily. As it is plenty powerful as is. Recoil Reduction has now been readjusted to be about 20% less effective than the base mod. Making it fairly controllable and scopes a fair chance to shine.
Unlike my other mods, I kept this mods Scopes as is, rather than altering them to match Horizon's Modular Scopes. This was done simply because Horizon itself does not make the Minigun/Missile Launchers scopes adopt the "Modular Scopes." And I quite liked this mods Scopes!
Overall, it feels really fun and hopefully, somewhat balanced! (Let me know!)

How to acquire - The SMMG can be found in the hands of Gunner Bosses and BoS Heavy Weapons members after level 20. And on generic 'Automatic weapons users' of said factions after level 40-50.
(Let me know how often this late game addition occurs, as it may be too frequent?)
The SMMG can be rarely found on a various Weapon Vendors after level 20. With more "high quality" vendors, having a greater chance of having it at all and having it in stock.
The Shoulder Mounted Machine Gun can be found at the Market Trading Terminal under the Trader "Gunari Mettbach."

Hot Rodder:

Ammo Types - 10mm.

Fire Modes - Full Auto only.

Notes - Requires a base Strength of 4. Its kept its built in increased rate of fire and to a much weaker fire Legendary Effect. That being a modified "Heated" (+ 5 Burn Damage, no DoT) Horizon Effect. This weapon also deals a Base Damage of 25. 8 points lower than the standard SMMG to somewhat balance its Unique Attributes. It's fire rate while astonishing, also makes it very difficult to keep on target. But if you can, things will melt, quickly.
You cannot customize its Grips, as it has a Unique one already, nor can you Reverse Engineer this weapon.

How to acquire- The Hot Rodder can be purchased from the Market Trading Terminal under the Trader "Blap Blap Meister."

Faded Glory:

Ammo Types- 10mm and 10mm HE.

Fire Modes - Full Auto only.

Notes - Requires a base Strength of 4. A Patriotic weapon if there has ever been one. I removed its innate ability to shoot frag rounds and replaced it with a custom made for this weapon ammo type. 10mm HE (more like Redneck 10mm HE). Which can be fired in full auto. This 10mm HE is practically all explosive and a little Ballistic damage and requires a specific, reworded Misc Note from the original mod to be in your inventory to be able to craft it. As well as quite a bit of material and skill.
Which when matched with the "Faded Glory's" lower fire rate. I hope balances it out. As well as dealing only the base 10mm Damage of 30. (three less than the SMMG).

How to acquire - The "Faded Glory" can be found on the Caravan Vendor named "Cricket" alongside the needed Misc Note named "Patriot's Last Will & Testament," which allows you to craft 10mm HE while its in your inventory. (Let me know if either respawn in her inventory!)

Greed Machine:

Ammo Types - 5.56.

Fire Modes - Full Auto only.

Notes - Requires a base Strength of 5. Probably the strongest variant in the bunch. Keeping its increased rate of fire and the ability to chamber 5.56 and a massive Magazine Size of 500. Though it did lose out on its infinite ammo gimmick. Naturally.
Its unique traits easily match Horizon's Minigun, even without speciality ammos. Which may make it too op. We'll see.
It cannot be Reverse Engineered, nor are you able to customize either its Grip or Magazines. 

How to acquire - Can be purchased from the Market Trading Terminal from the Trader named "Pete the Wheat" for a massive amount of caps totaling 20,000.

Phalanx: 

Ammo Types - 10mm.

Fire Modes - Full Auto only.

Notes - Requires a base Strength of 5. Its essentially the base SMMG but with a giant freaking Zweihander and shield attached to it. Which grants it absurd Bash damage, increased Damage Resistance while Aiming, and the change to stagger enemies when you bash them, in exchange for increased weight. 
This weapon is fairly potent, with only its weight being the limiting factor in why you'd ever use a basic SMMG over it.
Let me know how it fares!

How to acquire - Can be purchased from the Market Trading Terminal under the Trader named "Pete the Wheat" for a hefty sum and needing fairly High Trading skill to even do so.

Tenderizer:  

Ammo Types - 12-gauge Junk Shells and 12-gauge Shotgun Shells.

Fire Modes - Full Auto and Burst Fire.

Notes - Requires a Base Strength of 5. A big ass full auto Heavy Shotgun has the same amount of Base Damage as a Double Barrel Shotgun, of 30. Which would make it very, very powerful, but it's spread is considerable. As is its weight and Action Point cost.
Overall, it should feel potent, given everything, but not too strong unless you're literally face to face with your target.
In v1.0.7 of my SMMG patch I added in the ability to Burst Fire the weapon. It's a 4-round burst and it works alright, but requires you to hold the fire button down longer then you might expect. I'd use the Burst Fire option just to manage recoil/ammo better.

How to acquire - Can be purchased from the Market Trading Terminal under the Trader named "Gunari Mettbach" for a tidy sum and requires a very high Trading Skill to accomplish.


Red Flare:

Ammo Types- Flares.

Fire Modes - Full Auto only.

Notes - Requires a Base Strength of 7. A silly gimmick type weapon that is honestly really neat. So much so, I couldn't figure out much of anything to directly change about this weapon. As its main get, is the ability to actually weaponize Flares on any level and being able to ragdoll people with each shot.
Its damage is really not great and given my understanding about how many Flares you can get, it's not going win fights with Damage alone.
Thus, it stays as a silly weapon that just works as Spadey01 intended in this patch. (Let me know how it feels!)

How to acquire - Unlike all the other weapons in this patch, this weapon retains its base location if only to better help that whole area/quest, actually have a worthwhile reward. 
Honestly, its unique location was too good to deny, given how the weapon handles.

Known issues - Currently as of v1.1 of the original mod by Spadey01, the weapons all have issues with staying holstered. Meaning they holster, then unholster like 3 seconds later. See their mod page for details!
Another issue, affecting MY patch of these weapons, is that when the "Faded Glory" unique uses the Horizon's Weapon Kit (Ammo swapping etc) while the gun is out. It sort of freezes up the animation, turns the gun into a floating broken piecemeal thing.
The fix is to holster it or to have it holstered before you use the Weapon Kit.
The above has been fixed as of v1.2.5 of the base mod. However, 3rd person animation issues seem to still exist. So, stick to 1st person while using the SMMG!
The mod no longer suffers from any of the above issues as of v1.6 of the base mod! Yippee!

Install the Main File (ESP Version) from their page.

Then install my Replacer Patch.

Lewis Gun:

Ammo Types - 5mm, its speciality rounds, .30, and 7.62.

Fire Modes - Fully Auto only.

Notes - A very interesting gun. I've essentially made it a Heavy Weapon (I also increased its weight) that does not have access to customizing its Receivers, nor grips (base mod choice) but I kept, in spirit the idea of Barrels enhancing the weapon. As the base mod has some pretty wacky Barrels that range from granting various levels of Fire Damage with ignition (let me know how strong this one is!), a barrel that somehow converts bullets into Lasers and one that does the same but Plasma... These were some wacky weapon attachments. I decided to nerf them somewhat, going down from adding 5-10 damage to adding 3-6 Fire/Energy damage per mod. As well adding more VATS cost to all 4 of these speciality barrels. 
Crafting these items is both costly and very specialized in skill requirements.
However, these barrels and Horizon's various weapon Augments may put this weapon too far ahead of others.  Something to consider.
It's ability to chamber 5mm (which increases its Magazine Capacity by 50!) is based on it being a Heavy Weapon that ought to have an ammo type that can use specialized rounds in full auto. Which in base Horizon seems to only be the Minigun.
While its ability to chamber .30 and 7.62 is vaguley to match its irl history of being able to chamber 30-6 and .308 rounds.
Overall, the weapon should act as a more accurate, slow firing 'Heavy Weapon' that acts not unlike the Light Machine Gun, yet covers similar ground as the Minigun.

How to acquire - The Lewis Gun can spawn on Gunner Bosses and BoS Heavy Weapon carrying members after level 20.
Speciality Weapon Vendors begin selling the Lewis Gun after level 20, as well.
The Lewis Gun can be purchased from the Market Trading Terminal under the Trader "Pete the Wheat."

Issues - There is sadly an issue with this weapon and using Horizon's Weapon Kit (Ammo swapping etc) while the gun is out. As it sort of freezes up the animation, turns the gun into a floating broken piecemeal thing.
The fix is to holster it or to have it holstered before you use the Weapon Kit.
Modded weapons with custom animations have at times suffered this issue in other HZ patch hubs, sadly I'm not sure how to fix this without noodling around with Animations (which I have no idea about).
So, this issue is something we'll just have to deal with at the moment.

Install the Main File that uses the Explosives Complex (My Replacer doesn't need that mod though does include 40mm meshes from it thanks to their open perms. Much love to Kermiie for their mod and assets!)

Then install my Replacer Patch.

Thumper:

Ammo Type - All 40mm variants, just like Horizon's Pipe Launcher. 

Fire Modes - Semi-Auto only.

Notes - A fantastic rendition of the Thumper. Not wanting to futz with an already good thing, serves the same mechanical purpose of Horizon's Pipe Launcher. With that in mind, it no longer has access to Receivers BUT does have access to various Barrels, Muzzles, and Stocks. Which for the most part just change its Range and Bash Damage. Though the "Pirate Barrel" does grant it an increased Critical Hit Damage, it's doubtful to have meaningful effect. Really the increased Range and be able to do pretty solid Melee damage is what sets the Thumper apart and likely better than the Pipe Launcher.
The Legendary Version of this weapon no longer exists, as it was mainly just a visual variant with a Legendary Effect attached. It's visual material swaps have been folded into the normal Thumper.

How to acquire - The Thumper spawns on Gunner Bosses, BoS and Railroad Heavies from level 15 onward. It can also rarely spawn on Raiders after level 50. (Let me know if the later is too frequent!)
Weapon Vendors from across the Commonwealth have a very rare chance to have the Thumper in stock after level 15. With higher tiered Weapon Vendors having the highest chance to have them. (Brotherhood of Steel for example)
The Thumper can be purchased from the Market Trading Terminal under the Trader "Gunari Mettbach" for a somewhat high sum of caps.

Install the Main File from their page.

Then install my Replacer Patch of the mod.

The Incendiary Launcher:

Ammo Types - Missile and Missile API.

Fire Modes - Semi-Auto only.

Notes - Requires a base Strength of 5. A classic weapon. That irl is actually a literal flame thrower via napalm-esque rockets. Well, I didn't alter it too much from what Dak & Pig's incarnation. Some adjust damage to scale up against Horizon's vanilla Missile Launcher. Removal of stat changes from the Incendiary Launcher's 'charms' and removal of its Receivers. As the Missile Launcher doesn't have that either.
In terms of balance, this weapon certainly starts off very strong with its quad-rocket setup, and a handful extra, yet weak (compared to the usual stuff) weapon attachments.
So, I instead leaned into its lore and its intent. As it still has its molotov-esque effect with each rocket, I decided that it would be more fitting that this weapon only be able to fire the standard and API rockets. Leaving the nuclear missiles to the Missile Launcher, as well as Seeker Missiles. As that doesn't fit the lore of this weapon, all that much.

Though, tbh it's more that the base mod didn't have anything like that, modeled or simulated.
All in all, it's less of a sure upgrade over the base Missile Launcher, especially if you're a Explosives Main.
All of the "Uniques" have lost their Legendary Effects and essentially made visual variants to be found. With very minor weapon attachments when purchased from Vendors.

How to acquire - The Incendiary Launcher spawn on Gunner Bosses, BoS Heavy Troopers, and Missile wielding Super Mutants at level 20.
While the "Nefarious Napalmer" spawns on a certain Raider Faction, who love flames... at level 40.
The "Commando" spawns on Gunner Bosses at level 20.
And finally the "Black Box" spawns on Gunner Bosses, Bos Heavy Troopers, Missile wielding Super Mutants, and heavy weapon wielding Synths at level 20.
High tier Weapon Shops have a slim chance to have the Incendiary Launcher and its variants in their inventories after level 20.
The Incendiary Launcher, "Commando", and "Black Box" can be found at the Market Trading Terminal under the Trader "Gunari Mettbach."
While the "Nefarious Napalmer" can be found under the Trader "Pete the Wheat."
Prices and Trade Skill required to purchase them vary, depending on their rarity.

Install the Main File and when asked by the FOMOD choose the "Basic Installation."

There is a possible issue in that for whatever reason, I could not get the BA2 from this mod to function. Resulting in invisible weapons. Despite both having Backported Archive2 Support System and having used BA2 Archive Version Patcher. The fix ended up requiring me to unpack the BA2 Archive via BSA Browser (with .BA2 support) and placing the unpacked Archive into the main mods folder. Let me know if you have either a better fix, or are of need of aid regarding this issue. I think I just hit the BA2 limit with mods.

Then install my Replacer Patch of T6M's Pipe Weapons.

Pipe Single-Shotgun: 

Ammo Types - All 12-gauge shells.

Fire Modes - Semi-Auto only.

Notes - Worse than the Double Barrel Shotgun, for an obvious reason, and due to it dealing 1 less damage than the Double Barrel Shotgun. As it deals 29 Base Damage compared to the Double Barrel Shotgun's Damage of 30. I did this so that it might stand as a decent early game shotgun, that can potentially have a place even later on in the game. Otherwise, its weapon attachments are not unlike other Pipe guns. I did not carry over any of the projectile changes nor its innate armor piercing qualities, as neither fit within Horizon's ecosystem.

How to acquire - The Pipe Single-Shotgun spawns on Raiders and Gunner Conscripts starting from level 1.
Weapon Vendors from across the Commonwealth begin selling this weapon at level 1 as well.
The Pipe Single-Shotgun can be purchased from the Market Trading Terminal under the Trader named "Pete the Wheat."

Pipe Double-Barrel: 

Ammo Types - All 12-gauge shells.

Fire Modes - Semi-Auto only.

Notes - Actually has the potential to be ever so slightly be better than the Double Barrel Shotgun. Due to this weapon's lower weight and ability to use Pistol Grips. As well as its slightly faster Reload Speed. However, it does, like the Pipe Single-Shotgun, deal 1 less damage than the Double Barrel Shotgun. It otherwise shares many similar qualities with the Pipe-Single-Shotgun. Except that the Pipe Double-Barrel shares similar statistics of the normal Double Barrel-Shotgun. Which further allows this Pipe Double-Barrel to have some staying power within Horizon. 

How to acquire - The Pipe Double-Barrel spawns on Raiders, Gunner Conscripts, Children of Atom, and Railroad members starting from level 5. It's reasonable effectiveness has made it ever so slightly more popular than the Single-Shotgun.
Weapon Vendors from around the Commonwealth begin selling this weapon starting at level 5 as well. Though less frequently than the Single-Shotgun.
The Pipe Double-Barrel can be purchased from the Market Trading Terminal under the Trader named "Pete the Wheat."

Pipe Anti-Materiel: 

Ammo Types - .50 and .50 API.

Fire Modes - Semi-Auto only.

Notes - Requires a Base Strength of 4 to wield. A pipe weapon chambered in .50 BMG... Fuck it. It's weird and it deals -5 less Base Damage compared to a Hunting Rifle chambered in .50. As well as not being able to chamber .50 HE. (A bridge too far, even for me.) I also increased its base Action Point cost by 10 points (a 25% increase compared to the Hunting Rifle). 
Though its ability to come in a pistol format does give this weapon some life. Giving you a sort of pocket pistol Anti-Armor option.
Overall, this will be a sort of scrappy and worse Anti-Armor gun, that poor bastards of the Commonwealth are sometimes forced to use against the dangers within.

How to acquire - The Pipe Anti-Materiel spawns on Raiders, Gunner Conscripts, and Railroad Snipers after level 18.
Weapon Vendors from across the Commonwealth sometimes have the weapon in stock after level 15.
The Pipe Anti-Materiel can be purchased from the Market Trading Terminal under the Trader named "Pete the Wheat."

Install the Main File from their page.

Then install my Replacer Patch of it locating in the "Misc Files" tab of my download section.

Malorian Arms 3516:

Ammo Types - .50 AE only.

Fire Modes - Semi-Auto only.

Notes - A gun that is too cool not to have a Horizon Patch. Great animations etc. It even has a cool melee animation. As for my patch, all I did apart from the usual,  was add another Receiver. There isn't too much customization of the weapon. But its fun.

How to acquire - Can only be purchased from the Market Trading Terminal under the Trader named "Black Market"

Issues - The weapon has various animation issues, these are unrelated to my patch, as far as I know.

Install the Main File from their page. 

Then my Replace Patch for it.

Wasteland Ballistic Fist:

Ammo Types - .38, .45 and their speciality rounds for the Pipe version. 12ga, and all their speciality shells for the Combat Shotgun version. 

Fire Modes - Melee Semi-Auto.

Notes - A wild and interesting weapon, that does in fact consume ammo with each punch. I decided that this weapon warranted the ability to swap ammo, like other Horizon Firearms, despite it being a melee weapon. Honestly, because I was interested if it would work, and because its cool.
I also split the Fist into two versions split between the Pipe version and the Combat Shotgun version. This was done soley to make the ammo swapping experience function. 
Speaking about the ammo swapping, due to the fact that this weapon doesn't actually cause the weapons to fire a projectile the various ammos projectiles don't change the anything visually. However, they DO at least in my testing, grant whatever boons the ammo type grants. Cryo rounds cause your attacks to slow down your enemies and cause the 'frozen' visuals on whatever enemy you hit.
Because this weapon now merges both melee and firearm abilities, this weapon is almost surely NOT well balanced within Horizon. I may at some point fine tune it more, but right now I just think its a fun, goofy weapon. And that's how I'd treat it.
Though I'd be afraid of any NPC wielding it against you.

How to acquire - The Wasteland Ballistic Fist spawns on Gunners and Raiders after level 8 and 12. The later noted level being when the Combat Shotgun variant starts showing up.
Weapon Vendors from across the Commonwealth begin selling both variants of the Wasteland Ballistic Fist after level 8-12. 
Both versions of the Wasteland Ballistic Fist can be purchased from the Market Trading Terminal under the Trader named "Pete the Wheat."

zawinul for creating an amazing mod and supporting it for so many years. I would never have undertaking this mod page without loving Horizon as fondly as I do. And wishing that these incredible weapons had a compatible patch.
Sars99 their Horizon Custom Weapon Patch Resources & being very helpful with answering mine, and other patchers questions. Many Horizon mods would not function and would be worse off without Sars99. Their work is greatly appreciated!
coldev for creating Weapon Patches in such a way that inspired me to follow in their footsteps. And helping me when I needed it.
sushicid3 for their incredible Weapon Patches and more specifically, his test save! It has been of great help.
xxom3nxx for their fantastic Weapon Patches and continued work incorporating RobcoPatcher into their mod, and thus inspiring me to follow suit. Their example was paramount in me learning how to do it for myself!
And all the other countless Horizon Patch makers. Each of you inspired me and through peeking at your works, I gleaned a better understanding in how I might make my own patch. Without you, I would never have been able to do these patches. And somewhat how to layout this page. 

Scail for Colt-Mothman 6520 and N-80 Pistols Pack
Toasty Fresh & AbbyRawkz for N99 10mm Pistol - F4NV and Toasty Fresh's N99 Overhauled respectively.
C1ph3rr for N99C - Custom 10mm Pistol
DegenerateDak & CSEPteam for all their mods listed on this page and then some!
bp42s for his DegenerateDak ESLified Patch Hub. Which I now use as my base .plugin for patching! 
Brainstormepilog for Super Mutant Equality a Super Mutant Weapon Expansion
The6thMessenger for their Burst-Fire Framework (BFF) and their open permission to use assets from that mod! Very much appreciated!
Alexerator for Tanker Pistol and Crusader Pistol (Reimagined New Vegas 12.7mm Pistol - Fallout 76 Crusader Pistol), The Burst Shotgun - Winchester City Killer - Interplay Combat Shotgun, Lever Action Carbine Dak Addon, Homestead Carbine,  Scrap Shotgun, Cavalry Pistol, Surplus Pistol, PBW-9mm Pistol, and The Rock.
Donskie62 for their Crusader Pistol and 10mm Submachine Gun - Appalachia Flavor
asXas for Sjogren Inertia - Swede Dreams are Made of These & EM 2 Rifle No.9 Mk1 - From Trash to Glory
4estGimp, kbiru, and 103Sakamoto for patches for Sjogren Inertia!
103Sakamoto for their 1st Person Power Armor Footstep Fix for Various Weapon Mods - Glock 19X by FX0x01 - SREP REDUX - Mossberg 500 - HK G3 - Remington Model 700 - etc mod and their permission to fully integrate their mod into my patches! Thanks so much!
neeher for Select Assault Rifle, The Lewis Gun, and the Chinese Pistol Set.
targetedfox for The Laser Garand - a Post War Battle Rifle
AnUncleanHippy for their F4NV Trail Carbine and Rooski2007 for his Iron Sights fix.
Winterworld19 for their The Colt Monitor 3rd Person Animation Addon with Tactical Reload Support patches!
PrincessAries for their Navy Auto Pistol - M2074 Navy
arobot96 for their C6544 Revolver
Spadey01 & jhardingame for their Shoulder Mounted Machine Gun - Rat Runners Arsenal
Spadey01 & Selakii for their Pipe Carbine - Rat Runners Arsenal
Diakyuto for their Scorpio 61 - Vz.61 Machine Pistol, M1903 Infantry Rifle - M1903 Day of Infamy Redux and Slug Gun - Pump-Action Combat Rifle
resness for their Malorian Arms 3516.
JademanFitzro1 thanks for his Tactical Reload Patch.
DeadPool2099 for their 9mm Pistol (Browning Hi-Power) Redux and Wattz 3000 mkII Laser Gun
codeblackcrash for their 9mm Pistol (Browning Hi-Power) - Unofficial Update & their Capital Wasteland Hunting Rifle - Unofficial Update
TheFriedturkey & HcG x Grill for their Capital Wasteland Hunting Rifle
ShimSham for their F4NV Mysterious Magnum and .44 Magnum Revolver
Seanms1991 - Antistar - Diakyuto for their Thumper - Grenade Launcher
Kermiie for their Explosives Complex Assets. Much thanks for saving my Patch for the above mod!
drmabuse1981 for their Auto-Ordnance Corporation Laser RCW
And thanks to all those who contributed to help make any of the above mods possible