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

  • 4
    High Quality and Feels Durable

    I haven't had this for too long but I could immediately see a difference in quality from my previous BCG. The only downfall to me was when it arrived, it was noticeably dirty and even showed some signs of wear. I do not know if this was from a test for it, but I was under the assumption I was buying a new BCG. Otherwise, it works flawlessly and I am very satisfied with it.

  • 5
    Bolt carrier

    Worked as expected. Wouldn’t expect anything less from BCM. From everything I’ve read their quality control is second to none. I did a lot of research before ordering.

  • 5
    BCM Bolt Carrier Group

    Just what I needed to complete the build.

  • 5
    BCG

    Nice looking and well made

  • 5
    BCG

    I love BCM the best quality great prices and they get you your stuff fast

  • 5
    BCM bolt carrier and complete uppee

    BCM is top notch! Best in the business. I received my order in less than a week and everything was as described. I will continue to buy direct from them.

  • 5
    Fit, Finish, Function, Flawless

    You don't need a fancy finish to have a smooth operating BCG when the quality control is there. Rides smoother that other BCGs that I own that have slicker finishes applied. The bolt moves in the carrier with ease like it should due to proper tolerances. Truly the baseline of any quality AR build.

  • 5
    Sweet

    Everything showed up fast and perfect. Thanks.

  • 5
    Bcg

    This is my 3rd BCM bcg, put several thousand rounds through them, ZERO malfunctions. Incredibly smooth and reliable.