Complete Selection of Bolt Carrier Groups by WMD Guns. WMD Guns is a Custom Nickel Boron Coating Company with a patented Technology for improving Wear and Tear on Military Grade Firearms Parts such as their Bolt Carrier Group. WMD also uses other high performance coating technologies including Salt Bath Nitride (Nitromet, Melonite), Electroless Nickel Teflon, Electroless Nickel Boron Nitride, decorative ceramic top coatings on their Bolt Carrier Group.
WMD AR-15 NIB-X Semi Auto Nickel Boron BCG Bolt Carrier Group Polished
WMD NiB-X AR-15 Semi Auto Bolt Carrier Group Polished