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

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1.00 LBS
  • WMD NiB-X M16/M4 Bolt Carrier Groups w/SA Hammer
  • WMD NiB-X M16/M4 Bolt Carrier Groups w/SA Hammer
  • WMD NiB-X M16/M4 Bolt Carrier Groups w/SA Hammer
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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 and does not include the hammer. 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

WMD Guns has established a reputation of excellence based on extensive firearms and defense industry experience, plating expertise, and gunsmithing capabilities. They are innovators in nickel boron products for the firearms industry and the sole source of the NiB-X nickel boron coating process.


  • Bolt FinishNickel Boron
  • Bolt MaterialCarpenter 158 Steel
  • BrandWMD Guns
  • Caliber Gauge5.56 NATO
  • Carrier FinishNickel Boron
  • Carrier Material8620 Carpenter Steel
  • Carrier StyleM16 Bolt Carrier
  • High Pressure TestedUntested
  • Magnetic Particle InspectMagnetic Particle Inspected
  • Platform AR-15
  • Weight 12 Oz

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 www.P65Warnings.ca.gov. 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

Product ID:
Bolt Carriers
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