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
    Nice Piece

    Super clean and well made. Took me a moment to inspect the gas bolt staking, but looks fine. Mil Spec, MPI, shot peened equals no worries. Instant e-mail help too. Thanks

  • 5
    Excellent Product!

    Fast shipping like always. Carrier key is staked properly. Upgraded extractor spring. MPI inspected, it doesn't get any better than this. I've got about 4K rounds down the pipe so far w/ ease! HIGHLY RECOMMENDED.

  • 5
    bcg

    perfect companion to my recently purchased bcm m-4 upper, both upper and bcg look to be same quality as my older colt sporter, haven't shot it yet, but am confident I will be pleased with it

    Update, fired my bcm upper w/ bcm bcg on a dpms lower, worked flawlessy. 300 plus rounds, many rapid fire, no misfeeds, no failures to extract, used a chopped carry handle off of another upper, was dead on, didn't have to touch the sights. Thanks Paul for an absolutely outstanding product that is as good or better than my older colt. I highly recommend these uppers for every use.

  • 5
    Great product!

    Great product, 200 rounds no hiccups! Would reccomend one to anyone looking for a quality Bolt Carrier Assy. Wish they could make more faster, would like a back up. Great stuff!

  • 5
    outstanding

    great product.fast shipping

  • 5
    Great BCG

    Excellent craftsmanship. Functions perfectly in my BCM upper. 500 rounds downrange so far with zero issues...very accurate combo. Can't ask for more than that.

  • 5
    Colt quality without the price!

    Best BCG I have ever used.

  • 5
    Second to none

    Just add a McFarland one piece gas ring and you will have the most reliable BC group period. This is the smoothest functioning BC I have ever used and has solved a lot of issues I have run into with other BC's. Fit and finish is flawless. I will use nothing else for all my future builds and BC upgrades. I highly recommend this product.

  • 5
    Best BCG I have found!

    I bought this to replace my roughly finished RRA Bolt carrier. It was having FTEs with Wolf ammo but now it runs like hot butter with this BCM BCG. A must have upgrade for any AR!