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
    BCG

    Great product, works great, and love the BCM on the side of the bolt that can be seen when dust cover is open.

  • 5
    BCG

    Fit and finish is excellent as expected

  • 5
    Excellent product and even better shipping

    I ordered my BCG and was amazed at how fast it came to my door. 2 days after ordering online it was here. That beat out Amazon prime.
    The product is of the highest quality as you would expect coming from BCM. The bolt was within the perfect spec for my barrel extension (Faxon barrel) and the headspace was perfect.

    With your BCG you get an o-ring to add to the extractor spring if you choose, as well as a lot of swag

  • 5
    Great

    Very fast service and shipment. I have it installed in a new build. Complete BCM rifle. Hope to shoot it this week. Thank you.

  • 5
    Good Quality for a Fair Price

    Excellent BCG group at a competitive price. It wasn't particularly cheap, but after a lot of research, everyone seemed to say these were the standard for what a great BCG should be.

  • 5
    Very nice BCG

    Arrived quickly. Installed same day. Have not had opportunity to shoot yet. Transaction itself was very smooth.

  • 5
    bcm bolt carrier group

    Used the same one for my first build and have loved the quality, reliability and bang for the most "bang" for the buck. That's why I got the same bcg for my Grendel build.

  • 5
    Awesome

    Best bcg on the market. Properly made very satisfied

  • 5
    Great service

    U guys rock great service and super fast shipping vary happy with purchases will definitely buy more for sure.