WMD NiB-X AR-15/M16 Bolt Carrier Group NiB-X Black Polished No Hammer

Looking for a bolt carrier group that will provide you with long life, high reliability, and easy cleaning and maintenance? Look no further than the WMD Guns NiB-X Polished Black M16/AR-15 Full Auto Bolt Carrier Group! This BCG has been engineered for NiB-X Black coating to provide superior performance in even the most demanding situations. The components of the bolt carrier group have been coated and polished to reduce fouling, so you can keep your AR-15 running like a well-oiled machine. Whether you’re a professional soldier or a weekend warrior, trust the WMD NiB-X AR-15 BCG Black to give you the edge you need to succeed.

WMD NiB-X AR-15 BCG Black Specifications:

Bolt

• Carpenter 158
• magnetic particle Inspected
• Mil-Spec Gas Rings
• NiB-X Coated for better wear Protection

Extractor

• heat-treated and hardened per Mil-Spec
• NiB-X coated

Firing Pin –

• Manufactured per Mil-Spec
• heat-treated, hardened, chromed

Carrier

• AR-15 / M4 / 16 full auto
• 8620 Steel
• heat treated and case hardened
• NiB-X coated for durability and ease of cleaning.

Gas Key

• Hardened to Mil-Specs
• grade 8 hardened fasteners
•  NiB-X coated
• Staked per military specifications.

Cam Pin

• heat treated, hardened per Mil-spec
• NiB-X Coated
• SKU: NIBXBCG0001-BLK

NIB-X is WMD Guns’ proprietary nickel boron coating process applied directly to the bolt carrier group components. Nickel boron is an electroless coating that bonds at the molecular level to the steel substrate, producing an extremely hard, slick surface that dramatically reduces friction between the bolt carrier and the interior of the upper receiver. The reduced friction translates to smoother cycling, easier extraction, and a BCG that is significantly easier to clean than phosphate or parkerized carrier groups — carbon fouling wipes off the slick surface rather than bonding to it as it does with matte finishes. This BCG is sold without a hammer, making it ideal for builds where a separate hammer is already sourced or where a drop-in trigger assembly will be used. The bolt is machined from Carpenter 158 steel and magnetic particle inspected to mil-spec standards. The carrier is machined from 8620 steel and heat treated for durability. All components meet or exceed mil-spec dimensions for compatibility with standard AR-15 upper receivers, barrels, and gas systems. Available in polished and matte NIB-X finishes — polished provides maximum slickness and a bright silver appearance; matte provides the same durability and cleaning benefits with a lower-visibility finish.