Cryptic 6.5 Grendel - Type ll Bolt Carrier Group (BCG)

Cryptic 6.5 Grendel Type II Bolt Carrier Group BCG. Coated bolt carrier group for AR-15, M16, or M4 machined from Mil-Spec 8620 aircraft quality steel with shrouded firing pin and Mil-Spec chrome lined interior. Gas key chrome lined and heat treated; gas key secured to carrier with Grade 8 fasteners and properly staked per Mil-Spec. The bolt assembly is CNC machined from Mil-Spec Carpenter No. 158 steel and shot peened for increased strength per Mil-Spec; includes tool steel extractor with spring and viton O-ring; firing pin chromed; retaining pin and cam pin. HPT (High Pressure Batch Tested) and MPI (Magnetic Particle Inspected). Features include Mil-Spec BCG with 60-61 RC hardness, gas key staking, and compatibility with AR platforms. Finish options available include Black Nitride, Manganese Phosphate, and Nickel Boron. Package contents: Cryptic 6.5 Grendel Type II Bolt Carrier Group.