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
    FA/BCG

    Absolutely solid works well

  • 5
    This bolt carrier came with excellent fit and finish with a good clear BCM lettering and a properly staked gas key it runs great in my pistol build.

    Will recommended to anyone for a rifle build

  • 5
    Outstanding Bolt Carrier Group

    The BMC Bolt Carrier Group (MPI)-Auto is one of the best after market parts I have installed on my M4. I highly recommend this particular bcg to anyone looking to upgrade or replace what they are currently running.

  • 5
    Excellent Quality

    Very happy with my purchase!

  • 5
    BCM Bolt carrier group

    Ive always been very pleased with BCM products... all 3 of my rifles have this bolt carrier group.. enough said!

  • 5
    So far so good

    The build quality is great, it was a bit rough on my dry cycles but used some gun oil on all of it and smooth like butter. There was and is alot of brass shavings on the bcg which threw me off. I sent an email and asked about it and didn't get a response. I imagine they test them out maybe and that would explain that. While the price is on the higher side, the lifetime warranty would warrant/explain the price.

  • 5
    Fast shipping!

    Shipped same day

  • 5
    BCG

    replaced the bcg in a RRA with this one. i had no confidence in the improperly staked bcg that came with that gun. the BCM bcg gives piece of mind.

  • 5
    BCM bolt carrier group

    I have bcm bcg in three of my rifles..