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Bolt Carrier: 8620 Steel Case Hardened, Machined from Billet
Firing Pin: 17-4 H-900 Steel, Center-less Ground
Gas Key: 4140 Steel with Grade 8 Screws, Properly Staked, Machined from Billet
Cam Pin: 4140 Hardened Steel
Finish: Black Nitride finished with an ultra-hard, corrosion-resistant top surface layer for wear resistance and minimal need for lubricants.
Bolt: 9130 steel Shot Peened, Mil-Spec Dimensions, CNC Ground After Heat Treat, Black Nitride Finished MPI/HPT
Extractor: 4140 Billet, Manganese Phosphate Finished for Positive Grip
Enhanced: The new bolt carrier geometry was designed to reduce carrier tilt and the key bearing surfaces are relocated to increase reliability.
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