Odin Works ACC223BCG 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. Don't skimp on an essential part of your build, go with only the best. Features Mil-Spec dimensions Bolt Carrier Group Material: Case Hardened 8620 Low friction coating minimizes the need for lubricants Gas Key: 4130 Steel attached with Grade 8 hardware and properly staked into a milled “valley” to ensure proper positioning Cam Pin: Hardened 4340 cam pin Firing Pin: Mil Spec firing pin made of 8740 steel, center-less ground and Hard Chrome coated Bolt Assembly: The Bolt is “true” Mil Spec dimension and external surfaces are CNC ground after heat treat for a precision fit Bolt Material: Case Hardened 9310 Steel Extractor: 4340 Steel Mil Spec Extractor Spring & O-Ring Combination MPI: Magnetic Particle Inspected HPT: High Pressure Test