Diamondback Barrels 5.56 NATO AR-15 Bolt Carrier Group BCG Black Nitride DB15-BCGS. 56 Bolt Carrier Group BCG is coated in a black nitride finish to prevent carbon build up and ensure that your rifle keeps functioning. You can be confident that...
Diamondback Barrels 5.56 NATO AR-15 Bolt Carrier Group BCG Black Nitride DB15-BCGS. 56 Bolt Carrier Group BCG is coated in a black nitride finish to prevent carbon build up and ensure that your rifle keeps functioning. You can be confident that...