WMD Guns NiB-X Coating Bolt Carrier Group

A: 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.

A: Yes, it has a firing pin, and it can be used for 5.56 and 300 Blackout. It's ready to go as is.

A: Yes to 5.56 or .223 and firing pin included.

A: I put this in my last .223/5.56 build and it works like a charm and cleans up easily. Be sure to check the headspace after you install it.

A: 5.56/.223 and firing pin included.

A: Yes and yes.

A: David, yes, the parts with NiB-X Coating are the Bolt, Extractor, Carrier, Gas Key and Cam Pin.

A: Hector, If you mean a 'full auto' (M16) BCG then yes. This BCG has the full mass (no cut out) to help control the cyclic rate of the rifle. Instead of the cut out lower mass BCG that speeds up cyclic rate of fire. Obviously buffer and spring weights effect that also. But without the cutout it could function in select fire rifle.

A: Hector, yes Sir. It is a full fledged (Full Auto) specification M16 Bolt Carrier Group.

A: Jason, yes sir, this can be used for either 5.56 or 300 blackout. Hope this helps.

A: Its should work just fine 300B/556 use the same BCG, Buffer and CH.Only difference is magazines and barrel. Stay safe!

A: Jason, yes Sir, 300 Blackout shares the same case head dimensions as the . 223 Remington / 5.56mm NATO cartridge, it allows use of the same bolt carrier group and magazines as a standard M4/AR-15, making conversion as simple as swapping the barrel and muzzle device.