AR-308 / AR-10 Mil-Spec 7.62 Complete Bolt Carrier Group Nitride

• Material: Case Hardened 8620 Steel
• Finish: Black Nitride. This advanced 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
• Ejection Port: Area is milled with added material for more strength and rigidity
• Cam Pin: Hardened 4340 cam pin
• Firing Pin: Mil Spec firing pin made of 8740 steel, center-­‐less ground and Hard Chrome coated

The Bolt is “true” Mil Spec dimension and external surfaces are CNC ground after heat treat for a precision fit.

• Material: Case Hardened 9310 Steel
• Finish: All Bolt components Shot Peened & Black Nitride coated
• Extractor: 4340 Steel, Manganese Phosphate coated o Mil Spec Extractor Spring & O-­‐Ring Combination
• MPI: Magnetic Particle Inspected
• HPT: High Pressure Test