R GUNS 10.5'' HB A3 UPPER ASSEMBLY

R GUNS A3 FORGED RECEIVER MIL-SPEC HARD COAT ANODIZED 10.5″ 5.56X45mm NATO 1/7 TWIST WITH M4 FEED RAMPS NATIONAL MATCH GRADE BARREL TURNED TO CENTER STRESS RELIVED POLISHED CHAMBER MPI AIR GAUGED BARREL A1 CARBINE HAND GUARD QUAD RAIL GAS BLOCK A2 FLASH HIDER COMPLETE WITH BOLT ASSEMBLY AND CHARGING HANDLE