ODIN Works 6.5 Grendel Type 2 Black Nitride Bolt Carrier Group

ODIN Works 6.5 Grendel Type 2 Black Nitride Bolt Carrier GroupSpecifications Type 2 6.5 Grendel bolt face True Mil-Spec Bolt Carrier Group 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 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 Finish: All Bolt components Shot Peened and Manganese Phosphate or Black Nitride Extractor: 4340 Steel , Manganese Phosphate coated Mil Spec Extractor Spring & O-Ring Combination MPI: Magnetic Particle Inspected HPT: High Pressure Test Made in USA