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 BCG

    I haven't completed my build yet (just ordered the Upper) but you can see and feel the BCM difference. This BCG is solid, the key staking is perfect, and you know it's gonna work without flaw. I priced out other manufacturers and you can't beat this. BCM is my go-to company from now on.

  • 5
    Excellence

    Fit and finish, very nice. The company philosophy as well as quality made me try their products. I hope eventually purchase a complete Bcm rifle.

  • 5
    Excellent BCG

    Excellent bolt carrier group, I have these in all three of my AR-15's. Would recommend these to anyone. Once again BCM serves up a great product!

  • 5
    BCM BCG Is Top Notch

    Replaced my rock river BCG with BCM brand and I could not be happier. The quality control, performance and aesthetics really make this product a top choice.

  • 5
    BCM Bolt

    ROCK SOLID!!!!!!! The only bolt I use in my AR builds!!!!! Lightning fast 3 day shipping to hawaii!!!!

  • 5
    BCM Bolt Carrier Group

    Great product. Very fast delivery upon ordering. Fits and works great. Glad I choose this one !

  • 5
    BCM Bolt Carrier Group

    Very nice BCG shipping was lightning fast very pleased with my order

  • 5
    BCM Bolt Carrier Group

    Very well made, smooth finishes. Works flawlessly

  • 5
    No reason to shop elsewhere

    I ordered BCM because of their stringent QC process for a new build. Wanted no questions/problems there. Shipping was exceptionally quick. Group was exactly as it should be. Fit/head space all correct. Impressed, I ordered a 2nd one for replacing a commercial carrier in my older AR. I will likely expire from old age before these carriers cause a problem.