Manganese Phosphate Steel Bolt Carrier – AR10

Coated bolt carrier group (full auto version) for AR10 (.308 WIN / 7.62x51mm / 6.5 Creedmoor) machined from Mil-Spec 8620 aircraft quality steel with shrouded firing pin and Mil-Spec chrome lined interior. BCG includes the proper chrome lined and heat treated gas key. Gas key is secured to carrier with Grade 8 fasteners and properly staked per Mil-Specs. This ensures a strong staking and proper gas system functioning. Mil-Spec AR10 Bolt Carrier and Key: Compatible w/ any DPMS LR308 platforms Mil-Spec Bolt Carrier Machined from 8620 Aircraft Quality Steel and heat treated to 60-61 RC Mil-Spec Chrome Lined Carrier Interior Mil-Spec Chrome Lined Gas Key Key Staked with Grade 8 Screws, per Mil-Spec Full Auto Carrier (Backward compatible with all semi-auto rifles)