CMC Triggers Enhanced Nitrided AR-15 Bolt Carrier Group - 6mm ARC

Manufactured by CMC Triggers
SKU: 81635
MPN: 81635
Manufactured by CMC Triggers
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Orders of non-FFL items will ship same day if ordered before 3:30pm CST (M-F). FFL orders will ship within 5 business days if transfer details are provided.

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The CMC Triggers Enhanced AR-15 Bolt Carrier Group for 6mm ARC was designed to greatly increase the life and reliability of your AR. It features an intuitive design that reduces friction points in the upper receiver reducing wear and producing a smoother action. The Enhanced AR-15 Bolt Carrier Group is also finished in a salt bath nitride finish that further aids in lubricity and hardness allowing for more time between cleanings. This bolt carrier is compatible in all AR-15 upper receivers as it still retains Mil-Spec dimensions. It features an M16 cut with a flared end for increased weight for a better shooting experience when shooting SBRs or suppressed rifles while also limiting carrier tilt. The entire BCG is CNC ground after heat-treating to ensure pin-point accurate dimensions with the highest possible tolerances. The bolt carrier itself is made of 8620 carpenter steel while the bolt is made from 9310. CMC really cares about reliability so the bolt is shot peened for added strength and is also high pressure tested. If you want to build an extremely reliable rifle or plan on shooting suppressed the CMC Enhanced AR-15 BCG has you covered. 

  • Black Nitride finish
  • Enlarged forward ports
  • Optimized for suppressor use
  • Hardened 4340 cam pin
  • Mil-Spec 8740 steel firing pin
  • MPI and HPT tested
  • Mil-Spec Extractor Spring & O-Ring
  • 6.5 ARC compatible

With roots in aerospace manufacturing, CMC is perhaps best known as the producer of the original drop-in precision trigger for the AR-15/10 platform. CMC Triggers are dedicated to crafting the finest parts and accessories for law enforcement, military, and civilian use.
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Bolt FinishSalt Bath Nitride
Bolt Material9310 Steel
BrandCMC Triggers
Caliber Gauge6mm ARC
Carrier FinishSalt Bath Nitride
Carrier Material8620 Carpenter Steel
Carrier StyleM16 Bolt Carrier
High Pressure TestedHigh Pressure Tested
Magnetic Particle InspectMagnetic Particle Inspected
California Prop 65 warning

 WARNING: This product can expose you to chemicals, which are known to the State of California to cause Cancer and Reproductive Harm. For more information go to

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