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
    Perfect

    This BCG is tried and true. Looks great, runs great, fantastic quality. Don't skimp on the "heart" of your rifle, buy BCM and don't look back.

  • 5
    Quality BCG

    What you would expect! Quality product from a quality manufacturer!

    Zero regrets with this purchase!

  • 5
    BCG

    Excellent BCG, I can't imagine using another brand.

  • 5
    Bolt carrier group

    Excellent bolt carrier group. Does what it was design to do. No issues with any ammo. Highly recommend it if you want one of the best bcg on the market.

  • 5
    BCM bolt carrier

    I love this carrier group and purchased a second one for my 300 blk SBR and haven't had an issue in 1,000ish rounds.

  • 5
    BCG

    One of the best BCG from one of the best companies

  • 5
    My BCG

    I'm running my new BCG in a SIG M400 & it is running smooth. This is my first time using any BCM parts specifically for a carbine so no issues or complaints. AS much as I recommend BCM products to other users based on proven reliability, my next order will probably be a BCM mid-length upper.

  • 5
    Top Notch Service

    Received the BCM Bolt Carrier Group in record time. You can't ask for better quality and expeditious service!

  • 5
    Solid bcg

    BCM Perfection as always, there is only one company to turn to and that is BCM