WMD Guns NIB-X Bolt Carrier Group – 7.62x39

The WMD Guns NIB-X Bolt Carrier Group is a precision-manufactured replacement BCG engineered for AR-15 platforms chambered in 7.62x39. This BCG features WMD's proprietary Nickel Boron coating, which provides exceptional lubricity and corrosion resistance compared to standard phosphate finishes. Shooters upgrading to this BCG will experience easier cleaning, reduced friction, and extended service intervals—particularly valuable for the 7.62x39 cartridge, which tends to run dirtier than 5.56 NATO.

The NIB-X coating is applied to all contact surfaces and penetrates the metal for lasting performance. This is a drop-in replacement for mil-spec AR-15 BCGs in 7.62x39 builds, requiring no gunsmithing or fitting. The carrier is machined from 8620 steel, with the bolt machined from Carpenter 158 steel and properly staked gas key.

• Part Type: Bolt Carrier Group
• Compatible Firearms: AR-15 chambered in 7.62x39
• Material: 8620 steel carrier, Carpenter 158 steel bolt
• Finish: NIB-X Nickel Boron coating
• Installation: Drop-In
• Includes: Complete bolt carrier group (carrier, bolt, cam pin, firing pin, retaining pin)