Spikes Tactical 5.56/.223 Rem/.300 Blackout Bolt Carrier Group, Phosphate - ST5BG01

Your bolt carrier group is one of the most critical parts of your build. Don't buy an imitation. This is the same BCG we use on our builds.Features:Complete phosphate M-16 BCGPhosphate coating inside and out (bolt, carrier, and gas key)Laser engraved with ST Spider logoMil-Spec carrier - 8620 tool steel, full auto M-16Bolt- 158 carpenter steel, shot peened, high pressure tested (HPT), magnetic particle inspected (MPI)Mil-Spec extractor - 8620 tool steel, phosphate finish, extractor spring, black extractor inser and Viton O-ringMil-Spec gas key - 8620 tool steel, grade 8 hardware, properly staked, chrome interiorFiring pin with hard chrome finishCam pin phosphate finishRetaining pin