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AR-15/M16/M4 Full Auto Bolt Carrier Group w/Hammer - NiB-X Nickel Boron POLISHED


Availability:Sold Out


Country of Manufacture:US

Weight:0.94 lbs


NiB-X M16/AR-15 Full Auto Bolt Carrier Group w/Hammer - POLISHED

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NiB-X /M16/AR-15 Full Auto Bolt Carrier Group w/Hammer - POLISHED

All WMD BCG components are manufactured by Defense Industrial Base suppliers to WMD's 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.


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 – Faceted 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.

Hammer - Manufactured, heat treated, hardened and certified per government drawings. NiB-X Coated. Can be semi-auto or full-auto.

Additional Information

FFL Restriction No

Customer Reviews

Great customer service Review by C.S.
Customer service was top notch, item shipped same day, bcg arrived quickly and looks very nice. Only ran a few 300blk rounds thru so far, but it works flawlessly. (Posted on 4/19/2018)

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