The original creator of Lowered Weapons (lesma666) seems to have abandoned the Fallout 4 modding world. Therefore, a DLC patch was made by a different author (allexbulluk). Also, you may have added new unique weapons to your game by other mod authors which require a patch to make them " lower" correctly. So if you are playing with DLCs installed and unique weapons you will need to use all three mods for best results, as shown below:

MAIN FILE:
Lowered Weapons by lesma666
http://www.nexusmods.com/fallout4/mods/522/?

DLC PATCH:
Lowered Weapons - DLC Addon by alexbull_uk
http://www.nexusmods.com/fallout4/mods/13842/?

STANDALONE WEAPONS PATCHES: 
Lowered Weapons Animation Standalone Weapon Edition by sargeschultz11 >>> THIS MOD <<<
If you use weapons created by other mod authors (such as, DeadPool2099's Hunting Shotgun, or giggity12345's Wastelander XM2076) , then they will require their own individual patch. Check out the patches in the file section. As of 5/23/17 version 2.0 comes with an installer to help select which weapons to add to your game. 

ADVANTAGES:
The advantage of using these mods to lower your weapons is that they are using animation files and not scripting. Therefore you can add or remove them to existing saves without wrecking your game.

OPTIONAL Timing patch:
Lowered Weapons - Quicker Relax Timer
http://www.nexusmods.com/fallout4/mods/24307?
I made a small patch to reduce the amount of time it takes to lower your weapon. It was set at 3 seconds, but I modded it to 0.5 seconds. My mod does require an esp, but has no scripting.

Huge Thanks to dePog for typing up the informative description! 


UPDATE: 5/23/17
I've entirely redone how this mod is packaged. It's now packaged with an installer for you mod manager users :) For manual install add "meshes" folder inside your weapon of choice to "Data" folder

NOW AVAILABLE ON

I RECOMMEND SETTING FOV TO 80 FOR BEST VISUAL APPEARANCE

If you have a weapon you want added just shoot me a message. My plan is to add as many standalone weapons as I can so this will be a frequently updated mod. 

NOTE:
If you install a weapon that is supported by this mod AFTER you have had my mod installed first you will have to reinstall this mod so the animations work on your newly installed weapon.