Precision Reflex MK12 MOD 0 SPR Gen II Complete Upper 5.56 NATO 18" 1:7 Twist FDE

The Precision Reflex MK12 MOD 0 SPR Gen II is a complete AR-15 upper receiver chambered in 5.56 NATO, built around an 18" barrel with a 1:7 twist rate optimized for heavier projectiles. The barrel features a 1/2-28 threaded muzzle and the entire upper is finished in a Flat Dark Earth Cerakote coating. The MK12 MOD 0 SPR configuration is a special purpose rifle profile designed for designated marksman applications, pairing the longer 18" barrel with a rifle-length gas system to maximize velocity and dwell time. This is a complete upper receiver assembly ready to mate with a mil-spec AR-15 lower receiver.