WMD BCG NiB-X M16/M4 Bolt Carrier Groups w/SA Hammer

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  • WMD BCG NiB-X M16/M4 Bolt Carrier Groups w/SA Hammer
  • WMD BCG NiB-X M16/M4 Bolt Carrier Groups w/SA Hammer
  • WMD BCG NiB-X M16/M4 Bolt Carrier Groups w/SA Hammer
Now: $158.53
Was: $174.95
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Frequently bought together:


The WMD BCG is precisely machined from high-grade steel to M16 specs before receiving WMD Gun's proprietary NiB-X nickel boron coating. This coating results in super-smooth action, extreme corrosion resistance, and a harder-than-chrome surface that prevents carbon fouling from adhering, making this an ideal choice for any one who does high-volume shooting. This set features a polished finish. If you are looking for a long lasting AR-15 bolt carrier group, the NiB-X BCG is guaranteed to keep your rifle running reliably for years to come.


  • Proprietary Nickel Boron coating
  • Extremely durable and easy to clean
  • Slick surface makes for an extremely smooth action
  • Polished finish
  • M16 cut
  • Does not include hammer
  • Carrier Steel: 8620 and heat treated
  • Bolt Steel: Carpenter 158 and heat treated
  • Firing Pin: Hardened and chromed
  • Gas Key: Hardened and staked per military standards


WARNING This product may contain chemicals known to the State of California to cause cancer and birth defects or other reproductive harm. For more information go to You must be 18+ years old to shop and or purchase on our website and 21+ to purchase Ammunition/Firearms. Check local laws before ordering as you certify you are of legal age and satisfy all federal, state, and local legal/regulatory requirements. There are NO returns or exchanges on armor, firearms, ammunition, PPE equipment. Ammo ships UPS ground to the lower 48 states.
We reserve the right to fix any critical errors.

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Additional Information

Bolt Carriers
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