Cryptic .223/5.56/.300 AAC Blackout Left Hand Bolt Carrier Group (BCG) – Complete

Coated Bolt Carrier Group BCG (full auto version) for AR15, M16, or M4 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. 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 finished with firing pin retaining pin and cam pin. HPT (High Pressure Batch Tested) and MPI (Magnetic Particle Inspected). Specifications for Cryptic .223/5.56/.300 AAC Blackout Left Hand Bolt Carrier Group (BCG) – Complete: Manufacturer: Cryptic Finish: Chrome Plated Fabric/Material: 8620 Aircraft Quality Steel, Carpenter 158 Steel Cartridge: 5.56x45mm NATO, .300 AAC Blackout, .223 Remington Gun Make: AR Platform Gun Model: M16, M4, AR-15 Hand: Ambidextrous Included Accessories: Standard Weight: 11.55 oz Bolt Material: Steel Carrier Material: 8620 Steel Features of Cryptic .223/5.56/.300 AAC Blackout Left Hand Bolt Carrier Group BCG – Complete Reduced Carbon Fouling; Easier Cleaning Package Contents: Cryptic .223/5.56/.300 AAC Blackout Left Hand Bolt Carrier Group – Complete Chrome Lined Gas Key Key Staked with Grade 8 Screws Bolt w/ Spring and Ejector Tool Steel Extractor w/ Spring and viton O-ring Firing Pin w/ Chrome Finish Cam Pin