The GEN12 was not the first AR shotgun, but it is the first to use a standard 308 lower. The GEN12 upper was specifically designed to matte to any DPMS GEN1 308 Lower or other 308 lowers sharing the same pattern. The GEN12 upper will work with either the shorter DPMS buffer tube or the longer Armalite AR10/ 308 tubes.
The center of the upper is the short recoil system which cycles the action. This means there is no gas tube or piston. The cyclic rate can be tuned by adjusting buffer weights and springs by the end user. The upper will cycle birdshot or magnums and most everything in between. It reliably feeds both 2 ¾” shells and 3” shells on a standard short DPMS 308 buffer and spring. However they recommend a H3 buffer or a Hydraulic buffer when shooting magnums or any 3”.
Features:
- 18 ¾” barrel length
- Chamber 2 ¾” and 3” 12 gauge shells
- External Carlsson chokes , thread pitch- M22x.0.75
- Ported Barrel
- Short recoil operation
- Free float handguard with M-LOK rail at 3,6, 9 o’clock and full picatinny top rail
- Right side charging knob
- GEN1 DPMS 308 patterned lower
- Mil-spec buffer tube
- 308 short carbine buffer 3.8oz
- Adaptive Tactical adjustable stock
- Hogue rubberized grip
- Hiperfire trigger (3.5lb-4.5lb)
- Magwell
