Odin Works Bolt Carrier Group Black Nitride AR-15

As an essential part of any rifle, the ODIN Works .223 Black Nitrided, Type 2 bolt face is Mil-Spec and comes with a Case Hardened 8620 Steel Black Nitride Finish. This advanced low friction coating minimizes the need for lubricants. 4130 Steel Gas Key attached with Grade 8 hardware and properly staked into a milled valley to ensure proper positioning.