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

Cryptic .223/5.56/.300 AAC Blackout Right Hand Bolt Carrier Group - Complete\n\nCoated 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. HPT (High Pressure Batch Tested) and MPI (Magnetic Particle Inspected).\n\nSpecifications for Cryptic .223/5.56/.300 AAC Blackout Right Hand Bolt Carrier Group (BCG) - Complete:\n- Manufacturer: Cryptic\n- Fabric/Material: Carpenter 158 Steel, 8620 Aircraft Quality Steel\n- Carrier Material: 8620 Steel\n- Bolt Material: Steel\n- Caliber: .300 AAC Blackout, 5.56x45mm NATO, .223 Remington\n- Gun Make: AR Platform\n- Gun Model: M16, M4, AR-15\n- Hand: Ambidextrous\n- Weight: 11.55 oz\n- Condition: New\n- Included Accessories: Standard\n\nPackage Contents:\n- Cryptic .223/5.56/.300 AAC Blackout Right Hand Bolt Carrier Group - Complete\n- Chrome Lined Gas Key\n- Key Staked with Grade 8 Screws\n- Bolt w/ Spring and Ejector\n- Tool Steel Extractor w/ Spring and viton O-ring\n- Firing Pin w/ Chrome Finish\n- Cam Pin\n\nWhat firearm models does the manufacturer say Cryptic .223/5.56/.300 AAC Blackout Right Hand Bolt Carrier Group (BCG) - Complete is compatible with?\nAR Platform: M16, M4, AR-15