AT3 Tactical AR-15 Bolt Carrier Group 5.56 NATO/300 Blackout Black Nitride

AT3 Tactical AR-15 Bolt Carrier Group BCG 5.56 NATO/.300 Blackout Black Nitride. 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 lubricity which means this BCG is durable easy to clean and less reliant on lubrication when compared to mil-spec phosphate coating. The Bolt Carrier Group BCG is the workhorse of your rifle and a quality BCG is critical to reliable rifle function. Specifications for AT3 Tactical AR-15 Bolt Carrier Group (BCG): Manufacturer: AT3 Tactical Color: Black Finish: Salt Bath Nitride Fabric/Material: Steel Carrier Material: 8620 Steel Bolt Material: 9310 Steel Caliber: .350 Legend .300 AAC Blackout Gun Make: AR Platform Weight: 11.5 oz Condition: New Features of AT3 Tactical AR-15 Bolt Carrier Group BCG Finish type: Black Salt Bath Nitride Carrier Type: M16 Auto (Ideal for AR-15) Carrier Material: 8620 Gun Steel Gas Key Material: 4130 Steel Gas Key Screws: Grade 8 Bolt Material: MPI tested 9310 Steel Shot Peened Extractor Material: 4140 Steel Cam Pin Material: 8620 Steel Firing Pin Material: 4140 Steel Chrome Plated Mil-Spec O-Ring and Gas Rings Package Contents: AT3 Tactical AR-15 Bolt Carrier Group AT3 Tactical BCG-M16-BN: AR-15 Bolt Carrier Group 5.56 NATO/.300 Blackout Black Nitride