This Toolcraft Black Nitride AR15 Bolt Carrier Group is a 450 Bushmaster Full Auto BCG, manufactured using a 9310 steel bolt, and a 8620 steel carrier.
All manufacturing and coating is done by Toolcraft.
100% Made in USA and includes Lifetime Warranty from Toolcraft. If ever a problem, simply call Toolcraft and they will take excellent care of you with their no questions asked Lifetime Warranty.
Material: 8620 Steel
Type: Type 2
Gas Key Material: 4130 Steel; Grade 8 Gas Key Screws
Coating: Black Nitride
Bolt Material: 9310 Steel
Extractor Material: 4140 Steel
Mil-Spec Gas Rings (3)
Cam Pin Material: 8620 Steel
Firing Pin Material: 416 Stainless Steel
Other: MPI Inspected