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
    The best

    In my opinion the best bcg you can buy. Will be putting these in every build I do or can. Now if they could just expand there ar caliber platform I would be throwing them money.

  • 5
    Not Yet Tested

    This one is still in the box. It will be range tested next week.

  • 5
    BCM Bolt Carrier Group (MPI) - Auto

    I have been using BCM products since 2010. Great products fast shipping. Guess I am a long time Fan Boy.

  • 5
    BCM BCG/12.5” complete upper

    Recently built a 12.5” BCM/Aero Precision Pistol. Wanted a Tank of a gun and this is it. Absolutely flawless running rig . Great purchase and service experience.

  • 5
    Is this a serious question?

    You know damn well BCM is quality, and thisBCG is no different. I know the feedback is always welcomed, but at this point, its sorta meaningless. The reputation and track record speaks for itself. BCM all the way.

  • 5
    BCM Bolt Carrier Group

    Being the heart of an AR, BCM's bolt carrier group is as good as it gets. Their quality control assures the performance demanded in times of need.

  • 5
    Customer review

    Haven't yet run the new bolt carrier group but anticipate it running flawless like the rest!

  • 5
    BCM Bolt Carrier Group

    From experience order the bolt with the upper.
    Best parts in the ar diy space. Shipping is really fast and customer service is great.

  • 5
    Works great!

    So far I haven’t had any issues with it and I’m 600 rounds deep!