AT3 Tactical AR-15 Bolt Carrier Group BCG 5.56 NATO/.300 Blackout Black Nitride BCG-M16-BN. It features a black salt bath nitride finish MPI inspected bolt properly staked grade 8 gas key screws. The black nitride finish features excellent hardness and...
AT3 Tactical AR-15 Bolt Carrier Group BCG 5.56 NATO/.300 Blackout Black Nitride BCG-M16-BN. It features a black salt bath nitride finish MPI inspected bolt properly staked grade 8 gas key screws. The black nitride finish features excellent hardness and...