Precision Reflex MK12 MOD 0 SPR Gen II Complete Upper 5.56 NATO 18" 1:8 Twist FDE

The Precision Reflex MK12 MOD 0 SPR Gen II is a complete AR-15 upper receiver assembly chambered in 5.56 NATO, built around an 18" barrel with a 1:8 twist rate. The SPR (Special Purpose Rifle) configuration is optimized for accuracy at extended ranges, pairing the 18" barrel with a rifle-length gas system typical of MK12-pattern builds. The upper is finished in Flat Dark Earth Cerakote for corrosion resistance and a tactical matte appearance. The muzzle is threaded 1/2-28, compatible with standard 5.56 muzzle devices. This Gen II variant delivers a refined MK12 platform in a complete, ready-to-install upper assembly.