WMD Guns NIB-X Bolt Carrier Group (Without Hammer) – AR-15/5.56

The WMD Guns NIB-X Bolt Carrier Group delivers a premium nickel boron coating for shooters who want reduced friction, easier cleaning, and extended component life in their AR-15 platform. This BCG is sold without the firing pin retaining pin (hammer), making it ideal for builders who already have this component or prefer to source it separately. The NIB-X coating provides exceptional lubricity and corrosion resistance compared to standard phosphate or nitride finishes.

Machined from mil-spec Carpenter 158 steel (bolt) and 8620 steel (carrier), this BCG features proper staking, a chrome-lined interior, and full MPI/HPT testing. The NIB-X coating is applied to all exterior and interior surfaces, reducing carbon buildup and allowing for faster, solvent-free cleaning. Installation is drop-in for any mil-spec AR-15 upper receiver. Note: You will need to supply your own firing pin retaining pin to complete assembly.

• Part Type: Bolt Carrier Group (without firing pin retaining pin)
• Compatible Firearms: AR-15, M16, M4, 5.56 NATO/.223 Rem chamberings
• Material: Carpenter 158 steel bolt, 8620 steel carrier
• Finish: NIB-X nickel boron coating
• Installation: Drop-in (mil-spec)
• Includes: Bolt carrier, bolt assembly, cam pin, firing pin (firing pin retaining pin NOT included)