Genesis Arms Gen-12 MBS 12 Gauge AOW 7" Barrel - 5 Rd

Genesis Arms Gen-12 MBS 12 Gauge AOW 7" Barrel - 5 Rd

The Gen-12 MBS takes everything you know about the AR platform and channels it into a 12 gauge Any Other Weapon (AOW) that redefines what a compact shotgun can be. Classified under the National Firearms Act and built for those who understand exactly what that means, this is not a range toy — it is a specialized weapon system for a very specific mission set.

At just 21.75 inches overall with a 7-inch barrel, the Gen-12 MBS occupies a space no conventional shotgun can reach. Its short recoil operating system manages the considerable impulse of 12 gauge ammunition in a stockless, AR-pattern configuration — keeping the platform compact, controllable, and ready to cycle the next round without the bulk or length of a traditional shotgun design. The GEN1 DPMS .308-patterned lower receiver brings familiar AR ergonomics to an entirely unconventional platform, while the compact buffer system with integrated QD point keeps overall length at an absolute minimum without sacrificing function.

The free-float M-LOK handguard with accessory slots at 3, 6, 9, and 12 o'clock puts lights, lasers, and foregrips exactly where you need them, and the 1.375-24 threaded muzzle opens the door to chokes, breaching devices, and compatible muzzle accessories. A Hogue rubberized grip absorbs recoil and maintains positive purchase under stress, while the mil-spec AR trigger delivers a familiar, consistent break for shooters already comfortable with the AR platform.

NFA Any Other Weapon (AOW) Classification
Legally registered as an AOW under the National Firearms Act, the Gen-12 MBS occupies a unique regulatory category that enables its ultra-compact 7-inch barrel and stockless configuration.

Short Recoil Operating System:
A purpose-engineered short recoil system manages the substantial impulse of 12 gauge ammunition in a compact, stockless AR-pattern configuration, delivering reliable semi-automatic cycling.

7" Barrel with 1.375-24 Threaded Muzzle
An ultra-compact 7-inch barrel keeps overall length to an absolute minimum for maximum maneuverability in confined spaces, while the 1.375-24 muzzle threading.

Free-Float M-LOK Handguard:
M-LOK slots at 3, 6, 9, and 12 o'clock positions provide a complete accessory mounting solution for lights, lasers, vertical grips, and rail sections — without adding unnecessary bulk to an already compact platform.

GEN1 DPMS .308-Patterned Lower Receiver:
Brings the familiar ergonomics and control layout of the AR platform to a 12 gauge configuration.

Compact Stockless Buffer System with QD Point:
An engineered compact buffer system maintains reliable cycling in a stockless configuration while the integrated QD sling attachment point.

Specifications

• Gauge: 12 Gauge
• Action: Semi-Automatic, Short Recoil Operated
• Chamber: 2¾"
• Barrel Length: 7 Inches
• Overall Length: 21.75 Inches
• Muzzle Thread: 1.375-24
• Handguard: Free-Float with M-LOK® Slots — 3, 6, 9, and 12 O'Clock
• Lower Pattern: GEN1 DPMS .308 Pattern
• Buffer System: Compact Stockless with Integrated QD Point
• Trigger: Mil-Spec AR Trigger
• Safety: Posi Snap (Non-Ambidextrous)
• Grip: Hogue Rubberized Pistol Grip
• Capacity: 5 Rounds
• Stock: None (Stockless Configuration)
• Included in Box: (1) 5-Round Magazine, Soft Case, Limited Warranty