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
    The best around

    It’s the best bcg I’ve had and I’ve had a bunch. What you pay for is nominal compared to the performance you get from this bcg. Buy it, use it, and you’ll never be disappointed in it. You quite literally can’t go wrong purchasing it.

  • 5
    BCM bolt and upper

    BCM makes the best stuff, wish they made AR10 platform as well. 5 stars, wont be disappointed.

  • 5
    BCG

    When everyone else is hoarding rifle parts, you're still supplying tier 1 product to the American people. Uncle Sam smiles upon you. STARS AND BARS. Let freedom ring.

  • 5
    Bcg

    Looks great

  • 5
    The heart and soul of your rifle

    Bottom line, there is no substitute for quality and it doesn't get any better in my opinion than BCM products!

  • 5
    AR Platform

    If in stock - buy

  • 5
    Quality BCG

    It’s a quality BCG. The finish is much smoother than I was expecting. I would expect it will be easier to clean. Good staking and HPT/MPI as expected.

  • 5
    BCM Bolt Carrier Group

    My AR-15 consistently would not fire correctly or eject rounds. I tried everything to repair my current BCG, but it wasn't until I just gave up and purchased the BCM BCG and now my rifle fires flawlessly. Could not be happier, its a quality part.

  • 4
    Very detailed

    arrived in a timely manner