Precision Reflex Upper Assemblies for the AR15 platform.

The MK12 Mod H upper is 16.5" barreled upper with capable MOA accuracy. The flat top receiver has a Gas Buster® charging handle with military big latch, Pri rifle length black finished forearm, recce top rail that connects to the forearm rail.

PRi Mark 12 Mod 0 Gen III rifle with A2 buttstock and Douglas barrel 1-7 twist. Available in Black or Flat Dark Earth Cerakote finish. NOTE: This Rifle requires shipment to an authorized FFL.

The PRI Mark 12 Mod H Upper Receiver Assembly is a ready to shoot 5.56 upper with MOA accuracy. The Mark 12 Mod H Upper is equipped with a 16" Douglas 416 stainless steel barrel with a fitted bolt, and commercial bolt carrier.

The Mark 12 Mod 0 SPR Upper Receiver from Precision Reflex is a complete, fully tricked out tactical upper that’s ready to attach to the lower of your choice and deliver MOA accuracy. The key to the Mod 0’s impressive accuracy is the free-floated, 18" Douglas barrel of high-grade 416 stainless steel with 1-7" target rifling and M4-type feed ramps.

This Mark 12 Mod 0 Retro Gen II, ready to shoot 5.56 upper is equipped with a 18" Douglas 416 stainless steel barrel 1-8 twist with a fitted bolt and commercial carrier, flat-top receiver, PRi flip up front gas block front sight with thumb screw elevation adjustment and rear sight, rifle length gas tube, a Gas Buster charging handle with big ...

The PRI Mark 12 Mod 0 SPR Upper Receiver Assembly is a ready to shoot 5.56 upper, equipped with a 18" Douglas 416 stainless steel barrel with a fitted bolt, and commercial bolt carrier. The Mark 12 Mod 0 SPR has a flat-top picatinny receiver, PRI flip up front gas block front sight/rear sight, and rifle length gas tube.

This Mark 12 Mod 0, ready to shoot 5.56 upper is equipped with a 18" Douglas 416 stainless steel barrel 1-7 twist with a fitted bolt and commercial carrier, flat-top receiver, PRI flip up front gas block front sight and rear sight, rifle length gas tube, a Gas Buster charging handle with big latch, and an AE brake and collar.

PRI Mark 12 Mod 0 Gen III upper assembly kit. The kit is composed of PRI Gen III rifle length Black forearm, Gen III SPR Straight top rail, flip up front sight gas block A2 post, Gas Buster charging handle with military Big Latch, and AE brake & collar. PRI Rear sight. Black finish.

The MK12 Mod H has a 16.5" Douglas 416 stainless steel barrel with a 1-7 twist with M4 feed ramps. Upper is head spaced for 5.56 chamber. The upper comes with one 10 round magazine.