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
    Excellent BCG!!

    Ran great with XM855 Green Tip. Shot 150 rounds through with no hiccups and minimal lubrication. BCM is my go to manufacturer!

  • 5
    High quality

    High quality bolt carrier grp.

  • 5
    Beast

    Fantastic bcg group. Will run these in all my duty rifles.

  • 5
    BCG

    what can Say ,it's a BCM a name you can rely on.

  • 5
    Nice

    Nice tight fit and is smooth!

  • 5
    BCM is good stuff

    High quality, easy to install, runs perfectly - everything I've come to expect from BCM

  • 5
    Excellent as Usual

    I built a budget ar pistol from spare and relatively cheap parts. I ended up having to replace the budget BCG with a quality Bravo Co. BCG because the budget version was too short causing the buffer to slam into the retaining pin. Of course the Bravo Co. Bolt was the correct length and functions as expected notwithstanding other issues with the build. Worth every penny!

  • 5
    Excellent Mil-Spec BCG

    Excellent quality BCG. The gas key is perfectly staked, and the interior of the carrier is chrome lined. Shipping was fast too: Ordered on Saturday and it was at my door Monday morning.

    Also ordered BCM's KMR Alpha 15"; fit, finish, and feel is 10/10.

    Bravo Company sells some great products, and always gets them to you on time.

  • 5
    When only the best will do

    we all know where to go. What can I say that hasn't already been said? Ordered for BCG and charging handle and 2 days later I installed them both. Great company selling great components. I just wish all the others would follow Pauls lead, make a great product and charge a decent price for it and quit trying to price guns out of the hands of the ordinary people, hell, that's the kind of crap the left is pulling and a lot of companies are going right along with them. I say to hell with them, Ill give my money to BCM!! Hey, that rhymes, and its pretty catchy too.
    Customer service is also great. They recently answered an almost non ending series of questions from me . Their patience is astounding and their help much appreciated.
    THANKS BCM, again.