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
    Customer review

    Awesome quality. A bit spendy but worth it. Fast shipping

  • 5
    Customer review

    Review body is empty

  • 5
    Customer review

    Best you can buy!

  • 5
    Customer review

    Review body is empty

  • 5
    BCM BCG

    As I expected. BCM quality unmatched!!

  • 5
    Top Quality Parts As Always

    The bolt carrier group is the same excellent quality that all my bolt carrier groups have been from BCM. Test fired by BCM, the group works as it should. These are parts you can bet your life on.

  • 5
    Bcg

    I was very pleased with how fast my parts arrived and the quality is exelent

  • 5
    BCG

    I purchased this BCG for my rifle. My rifle has a Daniel Defense cold hammer forged barrel and has a slightly larger gas port which caused the rifle to run fine but slightly over gassed. Before purchasing this BCG I would come home smelling like slight sulfur (that gunpowder smell) and my girlfriend really hated it. Suprisingly it got rid of that issue. Honestly I’m kinda just rambling at this point just buy this BCG it works great and never had any malfunctions.

  • 5
    Oh silky smooth slick!

    Running this BCG in my 300 BLK 7.5 barrel with a Hera Arms LC Linear Compensator Gen2, 9" HERA handguard, and Spikes Tactical receiver set. Function and fit are above expectations. Super fast shipping, and great price!