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

    Review body is empty

  • 5
    Best BCG

    This was my 2nd BCG from BCM,excellent quality,never an issue,ran 500 rounds of just about everything,not 1 issue,that's why it was my second. Thankyou for the fast shipping,great packaging,also quad rail hand guard is awesome,looks great,lightweight. Awesome products!!!!

  • 5
    BCM BCG

    I’ve have had a case scratching issue for a long time finally narrowed it down to the bcg, so I bought the BCM BCG installed it and it worked flawlessly without scratching the casings.

  • 5
    BCM Bolt Carrier Group (MPI) - Auto

    Have a 10.5 AR pistol build. For some reason, I was having a FTE every 3 or 4 rounds. I replaced the standard bcg with the auto, and now it runs perfectly.

  • 5
    Excellent as expected

    BCM sets the standard.

  • 5
    Bolt carrier group

    Have not yet had a chance to fire but the fit was perfect. Installation easy.

  • 5
    Bcm

    I love my bcm it’s by far the most comfortable well made ar I’ve ever owned. Everything about it is so crisp and clean all the way from the appearance to the function. I’m looking forward to assembling another one soon!!

  • 5
    BCM Bolt Carrier Group

    Fits in place absolutely perfect. Super fast shipping! I love the product 100% I will definitely be ordering most of my parts from bravo company for all guns I build. Pure American great standard quality.

  • 5
    Worked great

    This BCG worked great. Threw it in and had no issues.