BCM® Bolt Carrier Group (MPI) - Auto

MSRP: $214.00
Your Price: $199.00
(You save $15.00 )
(1247 reviews)
SKU:
BCM-Bolt-Carrier-Group-AUTO-MP
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
    Bolt carrier group

    BCM makes high quality parts. I’m very happy with my purchase, will buy again from them (as soon as they catch up on inventory) and will definitely recommend to others.

  • 5
    Bolt Carrier Group

    Top product as always. Easy installation of extractor spring. Top notch service and products will continue to buy and use BCM

  • 5
    BCG

    Only inspected, not used, but IMO this is the BEST quality standard BCG available on the market. Slick exterior, polished rails and chrome lined interior. Gas Key staking is perfect and everything is tight. Good job BCM. Will buy again when in stock. Thanks.

  • 5
    Haven't finished this build yet

    But I have one in a pistol and a rifle and they work flawlessly

  • 5
    BCM bolt carriers

    I will only use BCM bolts. Period! End! If there out of stock at the time... I will wait until there back in stock...

  • 5
    BCM bolt carrier

    Hands down one of the best if not the best bolt carriers out there. Top notch and high quality products! You can trust this with your life.

  • 5
    BCG

    Top notch BCG
    Never an issue.

  • 5
    Bolt carrier group

    Need I even review this folks? Come on, nothin but the best from BCM! As usual! Smooth, solid, properly crafted from the folks who do their homework. I wouldn’t expect, or SETTLE, for anything less to rely on to protect the ones I love.

  • 5
    Bcg

    Only the best