The Fail Zero .450 Bushmaster AR-15 Complete Bolt Carrier Group (brand part no. FZ-450-01-NH) is a drop-in bolt carrier group built for .450 Bushmaster AR-15 uppers, with a bolt and extractor that also work in .458 SOCOM uppers. The kit ships complete with the bolt carrier, extractor, cam pin, carrier key, and firing pin needed for a full assembly. Fail Zero finishes the group in its EXO Nickel Boron Classic coating, a treatment that resists carbon fouling and wipes clean without solvents, and the group installs as a drop-in fit for most mil-spec .450 Bushmaster uppers. For big-bore AR-15 shooters who want a complete, easy-clean bolt carrier group, this bolt carrier group is ready to install.

Key Specifications

• Built for .450 Bushmaster AR-15 uppers.
• The bolt and extractor are also compatible with .458 SOCOM uppers.
• Ships as a complete bolt carrier group, ready to install.
• Kit includes a cam pin.
• Kit includes a carrier key.
• Kit includes a firing pin, completing the assembly.
• Finished with Fail Zero’s EXO Nickel Boron Classic coating, which resists carbon fouling.
• The Nickel Boron finish wipes clean without solvents, speeding up maintenance.
• Installs with a drop-in fit for most mil-spec .450 Bushmaster uppers.

Frequently Asked Questions

Will this bolt carrier group work in a .458 SOCOM upper? Yes, the bolt and extractor are compatible with both .450 Bushmaster and .458 SOCOM.

Does this include everything needed for a complete bolt carrier group? Yes, it includes the carrier, extractor, cam pin, carrier key, and firing pin.

What is the benefit of the Nickel Boron finish? It resists carbon fouling and wipes clean without solvents, making maintenance faster.

Buy the Fail Zero .450 Bushmaster AR-15 Complete Bolt Carrier Group

A complete, easy-clean bolt carrier group built for big-bore .450 Bushmaster and .458 SOCOM uppers saves shooters from sourcing individual parts. Order it from our Lubbock, Texas gun shop for fast, insured shipping.