DealBear Creek Arsenal Bolt Carrier Group comes MPI inspected. Perfect for your next 5.56/.223/.300BLK AR-15/M16 Build. The bolt is made from 9310 Steel and has been properly staked. Carrier is black nitride finish and bolt has a parkerized finish. SPECIFICATIONS: Bolt Finish Parkerized Bolt Material 9310 Steel Carrier Carrier Style M16 / Full Auto Gas Key Staked Magnetic Particle Inspect Yes Platform AR-15 from Primary Arms (Product BCA-BCG-15) |