DESCRIPTION
This weapon was primarily inspired by the look of the Tokyo Marui SGR-12 airsoft shotgun (which is apparently a replica of the Thor's Hammer from Resident Evil 7), but also incorporates elements from real-world designs such as the Atchisson AA-12 and Fostech Origin-12.

I started with the base game Bozar Light Machine Gun mesh and stripped it down to the bare receiver. I then added the pistol grip from the C4 Detonator, the magazine and trigger guard from the 25mm Grenade APW, the handguard from the Light Machine Gun, the rail system from the Marksman Carbine, the barrel from the Automatic Rifle, and bits and pieces from various other weapons.

Gameplay-wise, this weapon performs almost identically to the Riot Shotgun, but is fully-automatic (albeit with a slow enough rate of fire that you can easily fire single shots by practicing a little trigger control). It can be modded with the Light MG Expanded Drums and the 9mm Pistol Scope. I've also added the weapon to all the appropriate form lists, so that all perks and challenges that affect shotguns (i.e. Shotgun Surgeon) will work as expected.


LOCATION
The weapon can be purchased from the Gun Runners and other vendors across the Wasteland, or found in random loot drops. Of course, if you're feeling lazy, you can always use the following console command (Substitute ## with the Mod Index of the plugin in your load order):

player.AddItem ##000ADE 1;Gives 1 Auto Assault Shotgun

Detailed Instructions:

INSTALLATION
Extract all the files in the archive to your New Vegas data folder (which is the same folder where FalloutNV.esm is located) and then enable the ESP either in your mod manager of choice, or under "Data Files" in the launcher that runs when you start up New Vegas.