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

    Excellent quality.

  • 5
    Bolt Carrier Group - So smooth

    I have an AR from BCM and loved the smoothness out at the range. When I built my pistol, it came with a lower end bolt carrier group. I bought BCM's because I know how reliable it is and how smooth each shot is down range. I wanted that same quality in my pistol. I would recommend this to anyone who would ask me what I use and suggest.

  • 5
    BCM BCG

    Thank you for bubble wrapping the BCG and the lube baggie is excellent!

  • 5
    BCG and cyst svc

    Excellent bolt carrier group - it’s the heart of your rifle... well worth it. Fit and finish are excellent. AND- during a pandemic, social unrest, and a general time of civil disobedience - these guys got it to my mailbox FAST. Thanks BCM....

  • 5
    BCG

    The BCG was awesome.....at first I thought it was a regular BCG...but it is much better.....Thank you

  • 5
    BCG

    Doesn’t get much better and the customer service and fast shipping have made a life long customer!

  • 5
    BCG

    It is a BCM Bolt Carrier Group.
    Not sure what more needs to be said.
    Functions perfectly every time without fail.

  • 5
    Bolt Carrier Group

    Got it fast! Even with the whole Plandemic thing going on! Everything’s nice and tight, the way we like it :) Shoots great and has a cool BCM logo for all to see. I’ll be back for more!

  • 5
    Great fit, finish, and function

    What else would you expect from BCM. Great fit and finish. Ran about 500 rounds after assembling new BCM upper and CHF barrel. Runs perfect and very accurate. After cleaning noticed no odd wear patterns or anything unexpected. Can’t go wrong with it!