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

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List Price: $189.00
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 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 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: 456 Write a review.

  0 of 0 people found the following review helpful:
First time buyer September 27, 2016
Reviewer: Arthur Jaramillo from oxnard, CA United States  
Grate and happy with my BCM Bolt carrier group, would recommend to any one.

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  0 of 0 people found the following review helpful:
Excellent as expected. September 22, 2016
Reviewer: Dylan D. from Thompson, ND United States  
So far so good. I only have the old pre ban colts to base it off of, but seems great. Chews up the cheap steal and every grade of ammo I've fed it so far, aprox. 300 rounds of various ammo with 0 malfunctions. Seems like the hype and reputation is deserved.

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  0 of 0 people found the following review helpful:
Excellent September 22, 2016
Reviewer: Matt Harrod from Albany, KY United States  
The BCM BCG is one of the best in the business like all BCM stuff. It's the only BCG I buy. Build quality is excellent and price is reasonable for what you get. I highly recommend BCM for any AR needs!

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  0 of 0 people found the following review helpful:
Solid product. September 22, 2016
Reviewer: Jackie Brown from Garrison, TX United States  
I've worked with a few different Bolt Carrier Groups. The BCM is superior to those I have experience with. It felt more solid and well manufactured. The only one similar to it may be "fail zero", which I personally felt was a little heavy. This is a BCG without the "no lubrication" gimmicks; one that simply runs without failure. This is it! BCM is my personal favorite.

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  0 of 0 people found the following review helpful:
I can't ask for anything more September 22, 2016
Reviewer: Franky Drexler from Coconut Creek, FL United States  
I ran my delton DT sport with the upgraded bcm BCG, enhanced spring, and h2 buffer. This rifle runs like a dream now. My next move is bcm comp mod 0. Can't wait for that!! You guys rock and thank you for throwing multiple stickers in the box!!

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