WMD Guns NiB-X Bolt Carrier Group 450 Bushmaster AR
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Specifications
Description
The WMD Guns NiB-X Bolt Carrier Group is a replacement bolt carrier group for AR-platform rifles chambered in .450 Bushmaster. The bolt is made from 9310 steel, which the description cites for added strength and wear resistance compared with standard carpenter steel. The firing pin is hardened, heat-treated, and chromed, and the cam pin carries a NiB-X coating intended to reduce friction at a key wear point. The carrier exterior is finished in nickel boron, a coating described for its low coefficient of friction and corrosion resistance compared with a standard phosphate finish.
The assembly is described as a drop-in replacement intended for AR builders who want a nickel boron bolt carrier group for the .450 Bushmaster cartridge. The listing states the group is rated for full-auto use.
- Manufacturer: WMD Guns
- Model: NiB-X Bolt Carrier Group
- Platform: AR-15
- Caliber: .450 Bushmaster
- Material: 9310 steel bolt
- Finish: Nickel Boron
- Color: Nickel
- Coatings: Chromed firing pin, NiB-X coated cam pin