This Bolt Assembly from WMD Guns (part no. 1-NIBXBA450) is bolt-face machined for 450 Bushmaster and coated in WMD’s NiB-X nickel boron finish, engineered for long life, easy cleaning, and superior locking and unlocking action with barrel extensions.

Key Specifications

• Bolt face and dimensions machined for 450 Bushmaster.
• Coated in NiB-X nickel boron finish.
• Engineered for long life and easy cleaning.
• Provides superior locking/unlocking action with barrel extensions.

Frequently Asked Questions

What does the NiB-X coating add over a standard finish? NiB-X nickel boron coating is designed to extend service life and make the bolt easier to clean, while helping the locking and unlocking cycle run smoothly.

Will this fit a standard 5.56 AR-15? No, this bolt assembly is chambered specifically for 450 Bushmaster, not 5.56 NATO.

Buy the WMD Guns NiB-X Bolt Assembly, 450 Bushmaster

Upgrade your 450 Bushmaster build with this NiB-X coated WMD Guns bolt assembly. It ships fast from our Lubbock, Texas gun shop, and our AR-15 bolts selection has more AR-15 bolts.