Cryptic Bolt Carrier Group BCG - Complete 458 SOCOM/.450 Bushmaster Nickel Boron

Cryptic Bolt Carrier Group BCG - Complete 458 SOCOM/.450 Bushmaster Nickel Boron. 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). Specifications for Cryptic 458 SOCOM/.450 Bushmaster Bolt Carrier Group (BCG) - Complete: Manufacturer: Cryptic Fabric/Material: 8620 Aircraft Quality Steel Carpenter 158 Steel Carrier Material: 8620 Steel Bolt Material: Steel Caliber: .450 Bushmaster .458 SOCOM Gun Make: AR Platform Gun Model: M16 M4 AR-15 Hand: Ambidextrous Weight: 11.5 oz Condition: New Included Accessories: Standard Features of Cryptic 458 SOCOM/.450 Bushmaster Bolt Carrier Group BCG - Complete Reduced Carbon Fouling; Easier Cleaning; Full Auto Carrier (Backward compatible with all semi-auto rifles) Package Contents: Cryptic 458 SOCOM/.450 Bushmaster Bolt Carrier Group - Complete Gas Key Key Staked with Grade 8 Screws Bolt w/ Spring and Ejector Extractor w/ Spring and viton O-ring Firing Pin Cam Pin What firearm models does the manufacturer say Cryptic 458 SOCOM/.450 Bushmaster Bolt Carrier Group (BCG) - Complete is compatible with? The manufacturer says that Cryptic 458 SOCOM/.450 Bushmaster Bolt Carrier Group (BCG) - Complete is compatible with AR-15 M4 M16Cryptic CC-0405: Bolt Carrier Group - Complete 458 SOCOM/.450 Bushmaster Nickel Boron