NiB-X 224 M16/AR-15 Full Auto Bolt Carrier Group BCG POLISHED All WMD BCG components are manufactured by Defense Industrial Base suppliers to WMDs exacting specifications to provide the best BCG available. Specifically engineered for NiB-X nickel boron coating to provide long life, high reliability and easy cleaning and maintenance. The BCG components are coated and polished to reduce fouling adherence. Coating is guaranteed for life against chipping, spalling or flaking. Over 30K rounds in Government protocol endurance testing did not wear the coating off. Especially beneficial in short barrel setups and suppressed platforms. Specifications for WMD Guns Bolt Carrier Group (BCG): Manufacturer: WMD Guns Color: Nickel Finish: NiB-X Fabric/Material: 9310 Steel, 8620 Alloy Steel Gun Make: AR Platform Gun Model: M16, AR-15 Condition: New Bolt Material: 9310 Steel Carrier Material: 8620 Steel Features of WMD Guns Bolt Carrier Group BCG: Bolt Carpenter 158 heat-treated, shot-peened and magnetic particle inspected. Engineered from government drawings for NiB-X. Milspec gas rings. NiB-X coated (40% more wear-resistant than chrome). Extractor Manufactured, heat-treated, and hardened per government drawings. NiB-X coated. Firing Pin Manufactured, heat-treated, hardened, chromed and certified per Government drawings. Carrier M4/16 style full auto (heavier) functions in AR15 and M4/16 platforms, 8620 material, heat treated and case hardened. Manufacturing tolerances and surface finishes tightly controlled. NiB-X coated for durability and ease of cleaning. Gas Key Hardened to USGI specifications and attached using grade 8 hardened fasteners. Permatex No. 3D Aviation Form a gasket Type III Sealing Compound per MIL-S-45180 used on assembly. NiB-X coated. Staked per military specifications. Cam Pin Manufactured, heat treated, hardened and certified per government drawings. NiB-X Coated. Package Contents: WMD Guns Bolt Carrier Group
Ken –
This is some kind of Nickel Boron, Teflon mix. Seems smoother and slicker than my other NiB bolt carriers. WMD is considered one of the top NiB BCG manufacturers. I own 2 of them now. Top notch quality. I use one in my M16 also. Works flawlessly.
Papa –
Received the BCG last week and haven’t been able to use it yet but, it is highly rated and I know nickel boron is a breeze to clean. I have them in all my AR’s and love them all. And the price through Optics Planet was very reasonable with pretty fast shipping to the west coast.