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
    Anything and everything

    I only buy BCM now

  • 5
    Top notch

    You’re getting what you pay for. A proper milspec BCG.

  • 5
    Customer review

    Review body is empty

  • 5
    First AR build

    First AR build, so far it’s awesome

  • 5
    BCG

    For my son for xmas, nice bcg

  • 5
    One of the top BCG’s on the market...

    Just need to break it in, 100 rounds so far and works flawlessly. Head spaced correctly, locked up tight in my chamber. The BCM logo on the carrier was done nicely.

  • 5
    Very well made bolt

    Bolt is exactly as described , haven't had a chance to actually use it yet but visually it's perfect and looks to be identical of not better quality of my "M4" Colt bolt

  • 5
    Bcg

    Great product

  • 5
    Excellent company with excellent products

    I purchased an AR15 Recce 14.5 from BCM a couple years ago and it has been a great gun. I recently wanted to replace the bolt carrier and BCM provided the product earlier than expected. I will certainly be buying from them in the future.