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
    CBG upgrade

    fit, durability, reliability - overall performance excelent - this is a necessary upgrade for active shooters.

  • 5
    It's a BCG

    It works great. No issues

  • 5
    Best BCG Out There

    I use this BCG in a number of my rifles and I’ve never had issues. Works great and cycles smooth!

  • 3
    bolt carrier

    inside of carrier were the bolt resides was not coated . Bare gray steel, at $189 expected higher quality. Maybe a QC miss.

  • 5
    Shot great.

    Shot great, it didn't blow up so I say it's gtg.

  • 5
    Auto BCG

    Top notch, as expected from BCM. Came with the o ring to be installed on the extractor spring.

  • 5
    Amazing as always

    The amazing products as always BCM always hits it out of the park

  • 5
    Great quality

    Probably one of the best buys for your buck!

  • 5
    Bolt Carrier Group

    After over 40 years of working on AR rifles, I only use BCM BCG's in my rifles.. They consistently spec out perfectly and BCM is the absolute trusted name for Bolt carrier Groups.. Well priced for the quality that can be trusted.. My first, last and only choice when installing bolt carrier groups in my builds...