American Built Arms Company Pro 5.56 Bolt Carrier Nickel Boron Mil-Spec Silver ABABCNiB. 56 Bolt Carrier Nickel Boron Mil-Spec. This item only includes a bolt carrier; it is not a complete Bolt Carrier Group BCG. American Built Arms Company built...
American Built Arms Company Pro 5.56 Bolt Carrier Nickel Boron Mil-Spec Silver ABABCNiB. 56 Bolt Carrier Nickel Boron Mil-Spec. This item only includes a bolt carrier; it is not a complete Bolt Carrier Group BCG. American Built Arms Company built...