Cryptic AR15/M16/M4 6.5mm Creedmoor Bolt Carrier Group

Cryptic AR15/M16/M4 6.5mm Creedmoor Bolt Carrier Group is a coated bolt carrier group for AR15, M16, or M4 machined from Mil-Spec 8620 aircraft quality steel with a shrouded firing pin and Mil-Spec chrome-lined interior. The gas key is chrome-lined, heat-treated, and secured to the carrier with Grade 8 fasteners, properly staked per Mil-Spec. The bolt assembly is CNC machined from 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 with retaining pin and cam pin. HPT (High Pressure Batch Tested) and MPI (Magnetic Particle Inspected). Specifications: Manufacturer Cryptic; Finish Chrome; Fabric/Material 8620 Aircraft Quality Steel; Caliber 6.5mm Creedmoor; Gun Make AR Platform; Gun Model M16, M4, AR-15; Weight 17.8 oz. Package Contents: Cryptic AR15/M16/M4 6.5mm Creedmoor Bolt Carrier Group.