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BCM® Bolt Carrier Groups 


 

Bolt carrier group (auto version) for your AR15, M16, or M4.  Parkerized exterior and chrome lined inside carrier. Machined to USGI specifications.  This M16/M4 carrier includes the proper Mil-Spec gas key.  Gas key is chrome lined and heat treated per GI specifications.  Gas key is secured to carrier via USGI domestic mfg Grade 8 fasteners and properly staked per Mil-Specs.  These properly hardened parts insure a strong staking and proper gas system functioning.

The bolt assembly is machined from the correct Mil-Spec Carpenter No. 158® steel, shot peened for increased strength, includes tool steel machined extractor and ejector, BCM Extractor Spring, and is HPT (High Pressure Tested) and MPI (Magnetic Partical Inspected).

 


  • Milspec Carpenter No. 158® steel
  • HPT Bolt (High Pressure Tested)
  • MPI Bolt (Magnetic Particle Inspected)
  • Shot Peened Bolt
  • Tool Steel Extractor
  • Chrome Lined Carrier (AUTO)
  • Chrome Lined Gas Key
  • Gas Key Hardened to USGI Specifications
  • Grade 8 Hardened Fasteners Key Staked Per Mil-Spec
  • BCM Extractor Spring
  • Black Extractor Insert
  • Mil-Spec Crane O-Ring

 

 

 
Manufacturer Suggested Retail Pricing $160.00