American Built Arms Company Pro 5.56 Bolt Carrier Nickel Boron Mil-Spec Silver

American Built Arms Company Pro 5.56 Bolt Carrier Nickel Boron Mil-Spec Silver. 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 these Bolt Carrier Groups from rugged 8620 steel in an M-16 style that functions better in semi-auto or fully-automatic rifles. The American Built Arms Company Pro Mil-Spec 5.56x45mm NATO Bolt Carrier also includes a 4130 steel gas key with screws for installation. Enhance your weapon's performance and reliability with an American Built Arms Company Pro 5.56 Bolt Carrier ONLY - Nickel Boron Coated. Specifications for American Built Arms Company Pro 5.56 Bolt Carrier Nickel Boron Mil-Spec: Manufacturer: American Built Arms Company Color: Silver Finish: Nickel Boron Coated Fabric/Material: 8620 Tool Steel Cartridge: 5.56x45mm NATO Additional Features: Mil-Spec Condition: New Features of American Built Arms Company Pro 5.56 Bolt Carrier Nickel Boron Mil-Spec: Bolt Carrier Specification: 8620 Steel Nickel Boron Coated M-16 Style with more mass for better functioning in semi or full auto rifles Gas Key: 4130 Steel Nickel Boron Coated Gas Key Screws - 4140 Steel properly staked per Mil-Spec requirements Package Contents: American Built Arms Company Pro 5.56 Bolt Carrier Nickel Boron Mil-Spec American Built Arms Company ABABCNiB: Pro 5.56 Bolt Carrier Nickel Boron Mil-Spec Silver