WMD NiB-X Coated Bolt Carrier Group for AR15, 5.56/223

Description

Nickel Boron Coating. Harder than Tennifer, Melonite, Nickel Teflon and Hard Chrome (NiB-X is Rc72). Environmental corrosion protection. Very lubricious (CoF .07). Easier to clean – wipes clean in most cases. Less maintenance – longer usage between cleaning cycles and enhanced performance.
Lifetime warranty from chipping, flaking or wear.