BCM® Bolt Carrier Group (MPI) - Auto

MSRP: $214.00
Your Price: $199.00
(You save $15.00 )
(1247 reviews)
SKU:
BCM-BCG-AUTO
Features:
Milspec Carpenter No. 158® steel
BCM® Bolt Carrier Group (MPI) - Auto
Stock Status:
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.
 
Watch the video below to learn more about our quality control for Bolt Carrier Groups:
 
 
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.
 
***This product contains chemicals/materials known to the State of California to cause cancer and other reproductive harm. To learn more, visit www.p65warnings.ca.gov.***

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1247 Reviews

  • 5
    Excellent

    Build and finish was top quality

  • 5
    BCM BCG

    Awesome product. Great finish and fits much more positve extraction even over FN BCG. Would reccomend as an upgrade to anyone.

  • 5
    Only BCG I use

    This is the only BCG I use in my ARs. I have found it to work reliably for thousands of rounds. Maybe the low mass or chromed ones are better in some applications, for for a gp fighting at, give me BCM every time.

  • 5
    Rock solid!

    This BCG is rock solid. This is my second purchase as they are well made and the tolerance is great. The lockup with the barrel is like a vault. It will not be my last one.

  • 5
    BCM Bolt Carrier Group

    Quick delivery of quality part.

  • 5
    Worth every penny

    Solid BCG, highly recommended by friends and I see why.

  • 5
    Amazing

    When building my AR I knew there really was only one choice when it came to my BCG, and that was to go with BCM. I'd heard and read so many good things about the make and reliability of their products that I felt confident that going with BCM wouldn't disappoint and thus far I've been correct!

    The BCG arrived in perfect condition, I was like a kid on Christmas morning. Absolutely no issues with it at all. I am looking at getting another for my next build!

  • 5
    Fast and Sweet. Go BCM!

    Uniform and immaculate stakes on the gas key. Such a great BCG. 158 Carpenter and all. Ordered Fri night got Tues at noon. So quick and painless.

  • 5
    Bcg

    Perfect. Will never buy another brand for a bcg. -semper
    Cpl Oz