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BCM Bolt Carrier Group (MPI) - Auto

BCM Bolt Carrier Group - AUTO
BCM® Bolt Carrier Group (MPI) - Auto

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List Price: $199.00
Our Price: $169.00

Stock Status:In Stock

BCM® (MPI) complete bolt carrier group is fully assembled. (BCG)

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 ensure 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 Particle Inspected).

Prior to shipping, all BCM Bolt Carrier Groups are test fired for function. As such, the Bolt Carrier Group will show handling marks consistent with these quality control procedures.

Written by Bureau of Alcohol, Tobacco, Firearms and Explosives (BATFE), Chief of the Firearms Technology Branch
...M16 bolt carriers are not designed and intended solely and exclusively for use in converting a weapon into a machinegun and are not any combination of parts from which a machinegun can be assembled. Further, an M16 bolt carrier is not a firearm as defined in the GCA or a machinegun as defined in the NFA. An M16 bolt carrier is simply a machinegun part and as such its domestic sale and possession is unregulated under the Federal firearms laws. It is not unlawful to utilize a M16 machinegun bolt carrier in a semiautomatic AR15 type rifle.

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

Average Customer Review: 5 of 5 Total Reviews: 731 Write a review.

  0 of 0 people found the following review helpful:
Bolt carrier group July 22, 2019
Reviewer: David Mann from Palmer, AK United States  
Showed up very fast and I live in Alaska. The product was very nice quality. Very happy with BCM.

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  0 of 0 people found the following review helpful:
Best Quality July 22, 2019
Reviewer: Desert Trekker from AZ United States  
BCM bolt carrier groups are manufactured to be 100 percent reliable and last longer than average. This is a top tier BCG from the best company in the firearms industry.

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  0 of 0 people found the following review helpful:
Top notch July 22, 2019
Reviewer: David Baker from West Point, VA United States  
You can tell instantly, having experience with other BCGs, the craftsmanship of the BCM BCG far exceeds that of all others. Very impressed and would recommend to a friend.

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  0 of 0 people found the following review helpful:
Awesome bcg July 20, 2019
Reviewer: Mitch from Brookfield, WI United States  

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  0 of 0 people found the following review helpful:
Outstanding Customer Service + Quality BCG July 19, 2019
Reviewer: Anonymous Person from MI United States  
I recently purchased a BCG that was damaged by USPS during shipping. The box was a pancake and it appeared that it was run over by a forklift or something. No joke. Anyway, I contacted customer service via email and included photos of the damage. They immediately agreed to send a replacement. About 1 hour later, I received a shipping confirmation email for the replacement item, which included a pre-paid return label for the damaged piece. I never had to speak with anyone or explain anything, and they didn’t require me to return the damaged item first. They just sent me a new BCG that same day, no questions asked. That is true customer service!

As for the BCG, it runs great as expected. I have full confidence in the product after viewing their video on quality control procedures. I will definitely buy another for the next build.

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