WMD AR-15 NIB-X Nickel Boron BCG Bolt Carrier Group Without Hammer Matte

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WMD NiB-X AR-15/M16 Bolt Carrier Group with Matte Finish No Hammer

NiB-X M16/AR-15 Full Auto Bolt Carrier Group is manufactured by Military defense vendors.  WMD Requires tight tolerance specifications to provide the best bolt carrier group  available. This BCG has been engineered for NiB-X nickel boron coating to provide long life, high reliability and easy cleaning and maintenance. The components of the bolt carrier group have been NiBx coated.



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


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

Firing Pin –

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


  • 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

Additional information

Weight 1.5 lbs




BCG Coating


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