AT3 Tactical is bringing you the best with this Top-Tier Black Nitride Bolt Carrier Group BCG. 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 Cartridge: .350 Legend, .300 AAC Blackout Gun Make: AR Platform Condition: New Weight: 11.5 oz Bolt Material: 9310 Steel Carrier Material: 8620 Steel 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
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