Genesis Arms Gen-12 DPMS Lower 12 Gauge Shotgun 18" Barrel - 5 Rd

Genesis Arms Gen-12 DPMS Lower 12 Gauge Shotgun 18" Barrel - 5 Rd

The Genesis Arms Gen-12 18" brings the full-length shotgun format into the AR era — delivering the range, versatility, and terminal authority of a traditional 18¾" 12 gauge platform wrapped in the ergonomics, modularity, and familiar controls of an AR-pattern weapon system. This is the Gen-12 configured for the widest possible mission spectrum: home defense, field use, tactical application, and everything in between — with the semi-automatic capability and magazine-fed reliability that no pump-action can match.

Built around Genesis Arms' purpose-engineered short recoil operating system, the Gen-12 18" cycles reliably through the full range of 2¾" and 3" 12 gauge ammunition — from light target loads to full-power 3-inch magnum shells — without the manual intervention a pump requires. The 18¾" barrel delivers the velocity, pattern development, and downrange authority that a full-length shotgun is built for, while the externally threaded M22x0.75 choke system provides the flexibility to optimize your pattern for any application — from tight cylinder bore for close-quarters to improved modified for field and sporting use.

The free-float M-LOK handguard with a full-length Picatinny top rail delivers a rigid, zero-compromise optics mounting platform directly over the bore, while M-LOK slots at 3, 6, and 9 o'clock keep accessories exactly where you need them. The Adaptive Tactical adjustable stock brings length-of-pull customization to the platform for a consistent, repeatable cheekweld across shooters and shooting positions, and the Hogue rubberized grip maintains positive control through the recoil of even the heaviest 3-inch loads.

AR-Pattern 12 Gauge Platform:
Built on a GEN1 DPMS .308-patterned lower with fully familiar AR ergonomics and controls, eliminating the learning curve for AR-proficient shooters.

Short Recoil Operating System:
Genesis Arms' purpose-engineered short recoil system manages the substantial pressures of 12 gauge cycling in a reliable, consistent semi-automatic configuration.

18¾" Barrel with M22x0.75 External Choke System
A full-length 18¾" barrel maximizes velocity, pattern development, and downrange energy from every 12 gauge load, while the externally threaded M22x0.75 choke system.

Free-Float M-LOK Handguard:
Eliminates barrel contact pressure for consistent shot-to-shot performance, while the full-length Picatinny top rail provides a solid, uninterrupted optics mounting surface directly over the bore.

Fully Adjustable Stock
Provides multiple length-of-pull positions for a consistent, repeatable cheekweld and shooting position across different shooters, body armor configurations, and shooting environments.

Mil-Spec Buffer Tube with .308 Short Carbine Buffer:
Specifically weighted and tuned to the Gen-12's short recoil operating system, the 3.8 oz .308 short carbine buffer manages bolt velocity and cycling speed for reliable, consistent function.

GEN1 DPMS .308-Patterned Lower Receiver:
Delivers the familiar AR control layout and ergonomic profile in a 12 gauge configuration, enabling intuitive operation for AR-experienced shooters and compatibility with a wide range of DPMS .308-pattern lower components and accessories.

Specifications

• Gauge: 12 Gauge
• Action: Semi-Automatic, Short Recoil Operated
• Chamber: 2¾" and 3"
• Barrel Length: 18¾ Inches
• Choke Thread Pitch: M22x0.75 (External Choke System)
• Handguard: Free-Float with M-LOK® Slots — 3, 6, and 9 O'Clock
• Top Rail: Full-Length Picatinny
• Lower Pattern: GEN1 DPMS .308 Pattern
• Buffer Tube: Mil-Spec
• Buffer: .308 Short Carbine — 3.8 oz
• Trigger: Mil-Spec AR Trigger
• Stock: Adaptive Tactical Adjustable
• Grip: Hogue Rubberized Pistol Grip
• Charging Handle: Right-Side Charging Knob
• Capacity: 5 Rounds
• Included in Box: (1) 5-Round Magazine, Soft Case, Limited Warranty