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 customer service

    I have purchased items from BCM twice now and both times received great customer service! Also the items shipped very fast! Keep it up BCM!

  • 5
    Worth the price

    As i completed my first AR built, it was a toss up between what Mil-spec'd BCG I was going to use. After purchasing the trigger group, GunFighter Grips, GunFighter Stock, and the KMR Alpha, I knew I had to marry the M4 Upper with the best BCG in the industry...and she's performed wonderfully. I only have about 20 rounds thru my new build, but no hiccups. Well worth the money.

  • 5
    Excellent BCG!

    I haven't had a chance to test it yet as this will be going in my 300 Blackout Build but I can tell it's pure quality!

    I'm even happier with BCM's customer care!!

  • 5
    The best

    The best bolt carrier groups on the market. Function 100%. I have a BCM BCG on every one of my guns. Runs full auto suppressed for thousands of rounds between cleanings, too.

  • 5
    Excellent

    Part was exactly what I needed, it got here quick, the only unfortunate part was that the hand guard didn't get here as quick but that wasn't the fault of BCM it was Midway's fault.

  • 5
    BCM bolt carrier group

    Took my AR-15 to the range with my new bolt ,it works fine I went to clean the weapon and noticed one gas ring was warped and distorted I used no reloaded ammo, only Factory no big deal. I will replace the gas ring they cost very little

  • 5
    Awesome as always

    Great fit and finish, smooth operation and packed in oil. Just the way I like my.... :-)

  • 5
    bolt Carrier Group

    Great quality as expected from BCM

  • 5
    BCM Bolt Carrier Group - Auto

    I got the auto (M16) bolt carrier group for my build. Beautifully crafted with all of the mil-spec features you'd expect. Fit perfectly in my BCM 16" upper. To my mind there are only 3 companies in the US that make quality AR parts and Bravo Company is one of them.