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

The Precision Reflex MK12 MOD 0 SPR Gen III is a complete AR-15 upper receiver assembly chambered in 5.56 NATO, built around an 18" barrel with a 1:7 twist rate optimized for heavier projectiles favored in SPR (Special Purpose Rifle) configurations. The 18" barrel length is consistent with a rifle-length gas system, as is standard for the MK12 MOD 0 platform. The upper features a Cerakote finish in black for corrosion resistance and durability. This Gen III build replicates the military MK12 MOD 0 SPR profile, intended for precision mid-range engagements. Muzzle device and handguard details are not specified in supplier data.