Bear Creek Arsenal M16 Profile 5.56 Black Nitride Bolt Carrier Group

Bear Creek Arsenal M16 Profile 5.56 Black Nitride Bolt Carrier GroupThis Bear Creek Arsenal BCG features a full-mass M16 profile bolt carrier, machined from 8620 steel and finished with Salt Bath Nitriding. The gas key is properly staked, and the carrier does have forward assist serrations. The 5.56 NATO bolt assembly is made of 9310 steel and features a manganese phosphate finish. Every BCG goes through magnetic particle inspection (MPI).Specifications Bolt Finish: Manganese Phosphate Bolt Material: 9310 Steel Caliber: 5.56 NATO (will also work with .223 and 300 BLK) Carrier Finish: Salt Bath Nitride Carrier Material: 9310 Steel Carrier Carrier Style: M16 Bolt Carrier Magnetic Particle Inspected Platform: AR-15