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. 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: Carpenter 158 Steel, 8620 Aircraft Quality Steel Cartridge: .458 SOCOM, .450 Bushmaster Gun Make: AR Platform Gun Model: M16, M4, AR-15 Hand: Ambidextrous Included Accessories: Standard Weight: 11.5 oz Bolt Material: Steel Carrier Material: 8620 Steel 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
Thomas Harris –
The coating they use is awsome easy to clean cycles fast no jams using it on 450bm for the first time and im liking it better then nickle boron so far
Mike –
I have a number of these top of the line Crytic BCGs for my 5.56 Rifle, and really like how it performs. They are treated with a treatment which makes them very smooth and easy to clean. I bought this one for my .450 Bushmaster and haven't taken it to the range yet but expect it will be an upgrade to the current BCG in that Rifle.
lukeblue –
I was looking for a gold bolt for my .450 BUSHMASTER and ran across this Gem on OP and had to have it. It looks good and cycles great. A solid purchase.
lukeblue –
I was looking fir a gold 450 BM build and found this on OP at a good price