Apply coupon "DUT" for $5 Shipping over $125 - These AR15/M16 Bolt Carrier Groups feature WMD’s NiB-X Nickel Boron Coating, which provides extreme durability, performance, and reliability. The Nickel Boron coating is corrosion resistant and harder than Nickel Teflon, Melonite, or Hard Chrome with a hardness of RC 72. Cycling is smoother and debris and buildup can simply be wiped free. Components included in the Assembly are mil-spec and manufactured by US suppliers. The Bolt assembly is case hardened, shot peened, magnetic particle inspected, and constructed of Carpenter 158 steel. The extractor includes a high performance spring, black buffer, and black o-ring. The M16 style Carrier is machined from 8620 steel, heat treated, and case hardened. Attachment of the Gas Key is done with grade 8 hardened fasteners, which are staked per mil-specs. The Gas Key is sealed with the proper gasket as well. Bolt Carrier Group is also available with a Nickel Boron coated mil-spec AR15 Hammer. The NiB-X Hammer ensures the smoothing cycling possible.
SPECS:
Fits AR15/M16 mil-spec upper receivers. Nickel Boron coated. Bolt – carpenter 158 steel, case hardened, shot peened, magnetic particle inspected. Extractor – includes black buffer, black o-ring, and spring. Carrier – 8620 steel, heat treated, and case hardened. Gas Key – properly staked grade 8 heat treated fasteners.

Bolt Carrier Kit
Mfr Part #:NIBXBCG0003
Stock #:100-010-556WB

Bolt Carrier Kit w/Hammer
Mfr Part #:NIBXBCG0004
Stock #:100-010-557WB