BCM® Bolt Carrier Group (MPI) - Auto

MSRP: $214.00
Your Price: $199.00
(You save $15.00 )
(1247 reviews)
SKU:
BCM-Bolt-Carrier-Group-AUTO-MP
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
    The gold standard for BCG.

    Very happy with it.

  • 5
    Quality

    Best BCG for the price and great quality control

  • 5
    BCM 5.56 BCG

    Very well made. Excellent staking. Night and day difference on the BCG i swapped out with BCM. replacement. Highly recommended.

  • 5
    Bomb.com

    This is the last bcg you’ll ever need. If BCM has a product that’s out of stock, I can wait until it’s restocked. Thanks a lot!

  • 5
    Great reliable part I don’t need worry over. Reliability is key in a high stakes game, Bcm bcg puts my mind at ease.

    Keep up the quality parts!

  • 5
    Bolt carrier group

    Amazing piece

  • 5
    BCM BCG

    This is the best bolt carrier group in the business. Packaged well and shipped fast. I'm glad they were in stock!

  • 5
    Great product as reviewed by other

    Just purchased the BCM BCG for my build. When doing research off bolt carrier groups I found that BCM makes a superior product and is tested in superior ways. I finally finished my build and put my new BCG in and it does exactly what intended to do. I purchased a few other BCM products for my gun which all have been great.

  • 4
    Bolt Carrier Group

    My OEM (not a BCM) bolt broke at the pivot. I bought this BCM unit to replace the entire BCG since I could no longer trust the OEM BCG. I later decided to replace the entire upper. This BCM unit appears to be a quality-made unit. Only 4 stars right now as I just recently received my BCM M4 Carbine upper. Will expand on this after more rounds down range.