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
    Best BCG's around.

    Have used BCM auto BCG's for years in my builds and won't use anything but, by far the best made and running bolts on the market.

  • 5
    BCG

    First thing first. I ordered and this was at my door in 3 days. Wow. Super fast shipping. At first I didn't think changing the BCG would make much difference but I was wrong. The BCM'S BCG runs so smooth. I'm convinced it does make a difference. I love it. I also have the gunfighter charging handle and love that too. Great products and awesome service.

  • 5
    Fast shipping quality bolt carrier

    The bot carrier I received shows quality and professional workmanship that's what I expected from Bravo company, for my rebuild I always buy from bravo company you can reley on their parts.

  • 5
    flawless

    Because I live in the most free state in the union, California, I have been able to successfully put this BCG through an extremely tough torture test.
    Unlike most states, here in California we have support from our gov. They have been so gracious allowing us to use those HIGH CAPACITY 10rd mags which really helped me put this BCG to the test. Round after round the BCM BCG did not fail me. How many other companies can say their BCG made it through a 10rd mag w/o getting too hot and melting? I cant think of one.
    Also, because our state gov has been so kind, we have these nifty "bullet-buttons" on our rifles which allows us to quickly and tactically reload our 10rd mags. And because of the advantages the "bullet-buttons" presents, it brought me to the second portion of my torture test which was to go through a 2nd 10rd mag before it cooled down between reloads. And once again, the BCM BCG did not get too hot and melt.
    Therefore, I would definitely recommend this BCG to anyone

  • 5
    Best Gear at Any Price

    BCM has my total trust and loyalty when it comes to the products it offers. I am confident they have done all that is possible to insure flawless, rugged performance out of products of the highest quality. All of their offerings are products you can stake your life on. I highly recommend BCM to all my friends and other brands to my enemies!

  • 5
    Great Company!

    Fast service and shipping. Great bolt carrier group works as advertised. Thanks BCM!

  • 5
    Nice BCG

    I bought this,to replce my factory SIGM400 BCG which had all sorts of feed and extraction problems with high grade ammo Hornady 223, American Eagle 556 and PMC 223.
    This BCG worked perfectly. Just returned after running it mid wet. Ran throgh all previous ammo mentioned; 200 rounds without 1 malfunction. Good job Bravo Co.

  • 5
    Excellent quality and excellent service!

    Excellent quality and excellent service!

  • 5
    Bcm bolt carrier group

    This is the second bcm bolt carrier group I have purchased 0 issues with the first one with close to 6000 rounds fired. Using the new one for a 300 blackout build. As always great products and service from BCM.