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
    Awesome as usual

    I've only used two of these but they've been great. This one will be ran less frequently than the first one, but the first one is still going strong after several years of abuse. The new one will last a lifetime I'm sure as it won't be punished. These baby's are worth every penny, top quality and durable as hell. Great job BCM.

  • 5
    300 Blackout Upper Build

    BCM bolt carrier group works flawlessly. 250 rounds down range this weekend and the 300 Blackout shot well. No malfunctions. I Have already ordered another one for the next build.

    Good stuff. Life is good!

  • 5
    Great product, great service

    As usual you guys don't disappoint! Wanted a great BCG, got one!!

  • 5
    Top of the line

    Excellent quality and shipped out fast.

  • 5
    Bolt Carrier Group

    I could not be happier. When my original BCG broke off a gas key bolt, I saw it as an excuse to buy some higher quality. There was no hesitation. I promptly ordered the bcm bolt carrier on Monday and it was in my hands by Wednesday.
    I can tell a big difference just in manually cycling the rifle. Smooth, high quality parts and top notch customer service.
    I will be ordering directly from BCM in the future, forget about amazon!

  • 5
    By far the best

    Can't beat BCM BCGs... Top notch in every aspect.

  • 5
    Fantastic company

    BCM does things the right way. Shipping is fast and the products are of high quality.

  • 5
    BCG

    Great product an very fast shipping

  • 5
    Great service

    Have bought BCM parts for all of build except the 80% lower. Haven't put it together yet, but their service is amazing and parts are exactly as described.