WMD Guns Bolt Assembly – .450 Bushmaster AR-15

The WMD Guns Bolt Assembly for .450 Bushmaster provides a factory-grade replacement or upgrade for AR-15 pattern rifles chambered in this straight-walled cartridge. Designed specifically for the higher pressures and larger case head of the .450 Bushmaster, this bolt assembly ensures proper headspacing and reliable extraction in hunting and defensive applications where this cartridge excels at close to medium range.

Manufactured with a NiB-X nickel boron coating, this bolt assembly offers enhanced lubricity and corrosion resistance compared to standard phosphate finishes. The coating reduces friction during cycling and simplifies cleaning after extended use. Installation is straightforward for anyone familiar with AR-15 bolt carrier group maintenance—extract the firing pin retaining pin, remove the cam pin, and the bolt slides out of the carrier. Professional installation is recommended if you're unfamiliar with AR-15 disassembly or need to verify headspacing with your specific barrel.

• Part Type: Bolt Assembly
• Compatible Firearms: AR-15 chambered in .450 Bushmaster
• Material: Steel
• Finish: NiB-X Nickel Boron
• Installation: Drop-In (headspacing verification recommended)
• Includes: Bolt, extractor, ejector, gas rings, cam pin, firing pin, firing pin retaining pin