R GUNS 14.75” m4 carbine A3 UPPER ASSEMBLY

R GUNS A3 7075T6 FORGED RECEIVER MIL-SPEC TYPE 3 HARD COAT ANODIZED 5.56X45mm NATO 1/9 TWIST WITH M4 FEED RAMPS .750 CHROME MOLLY 14.75” M4 NATIONAL MATCH GRADE BARREL TURNED TO CENTER STRESS RELIEVED 1/2-28 R.H THREAD POLISHED CHAMBER PARTICLE TESTED AIR GAUGED M4 HAND GUARD LOW PROFILE GAS BLOCK BOLT ASSEMBLY CHARGING HANDLE VORTEX FLASH SUPPRESSOR