FailZero FZ 450 Bushmaster Bolt Carrier Group (No Hammer) – AR-15 .450 Bushmaster

The FailZero FZ 450 Bushmaster Bolt Carrier Group delivers reliable cycling for AR-15 platforms chambered in .450 Bushmaster. Designed for the increased bolt thrust and pressures of the .450 cartridge, this BCG handles straight-walled big-bore loads without the durability concerns of standard 5.56 carriers. The no-hammer configuration allows shooters to pair this carrier with their preferred hammer assembly for custom trigger setups.

Coated with FailZero's proprietary Nickel-Boron (NiB) finish, this carrier provides permanent dry lubrication that reduces friction and resists carbon fouling. The coating penetrates the metal rather than sitting on the surface, maintaining performance even under sustained fire. Installation is drop-in for properly configured .450 Bushmaster uppers—no gunsmithing required. This BCG does not include a hammer; ensure your lower parts kit or existing fire control group provides one.

• Part Type: Bolt Carrier Group (No Hammer)
• Compatible Firearms: AR-15 chambered in .450 Bushmaster
• Material: Steel carrier and bolt
• Finish: Nickel-Boron (NiB)
• Installation: Drop-In
• Includes: Bolt carrier, bolt assembly, firing pin, cam pin, retaining pin (hammer not included)