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
    Great Price For A Great Product

    Purchased this as a replacement for my AR. My old one had seen in access of 10k rounds and was starting to show some serious signs of wear (pitting). Found this BCG and had good reviews. I 100% trust BCM’s products and the new carrier’s fit and function is great.

  • 5
    Excellent!

    I actually purchased from Primary Arms. However I did purchase spare firing pins directly from the BCM website.
    Both BCG and firing pins are of exceptional quality! BCG mated well with my Faxon Arms barrel.

  • 5
    All is well

    I haven’t put her to use yet but upon arrival I took it apart and inspected everything. I didn’t come across a single flaw or blemish. These guys do fine work and I decided to go with BCM because of their reputation. Thanks guys.

  • 5
    BCM Bolt Carrier Group (MPI) - Auto

    Best BCG on the market. Fair pricing and quick delivery.
    Thanks,
    D

  • 5
    Customer review

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  • 5
    Can't beat BCM

    Needed for an rifle that recently turned sbr, currently sitting with just around 900 rounds on it suppressed. What can you say its BCM.
    It just works.

  • 5
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  • 5
    BCM Bolt Carrier Group (MPI) - Auto

    Quality,fast shipping...will be doing business with Bravo in future

  • 5
    Why pay more

    I have purchased two of these uppers so far. They far exceeded my expectations. I would come back to these again for my next build every time. I don’t know why they are marked as blemished I don’t see any problems with the two I have. They will soon have far more scrapes and scratches as I use my firearms frequently. I also have the BCM bolt carrier groups and they are hands down top quality. Shop here you won’t regret anything.