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
    Great BCG

    Great finish, functions great out of box, added CraneO ring since running in 10.5 upper. Fast shipping

  • 5
    Could not be happier

    I love it very. fast delivery .cool set of stickers to go with a great piece of machinery will be picking up another very soon

  • 5
    Very pleased

    I am very pleased with this bcg. It was oiled and well packed when I received it. The gas key was staked really well. Definitely will purchase more .

  • 5
    BCG

    Great product. My go-to BCG for builds.

  • 5
    BCM Bolt Carrier

    The product I received looked great and was packaged in oil. I could not believe the fast shipping. Very impressed and can't wait to order some more products on my next build!!

  • 5
    Ordering and Delivery

    Ordering and delivery of the BCG was right as promised. Tracking information sent with fast accurate delivery. Can't wait to use the product to improve an M4 build. This will be my 2nd BCG from BCM. Their's just seems to be the best on the market.

  • 5
    BCM Bolt Carrier Group (MPI) - Auto

    Excellent!

  • 5
    Great product

    I cannot wait until my AR build is complete. The shipping was lighting fast, and the workmanship is amazing.

  • 5
    Great product, got here quickly

    The carrier group shipped right after I ordered it and was here in two days. I haven't used it yet as it's just a spare incase I wreck the one in my carbine now. It came in sealed in a plastic bag and I could see there was plenty of lube all over it so it should keep nicely until the day arrives when I need it. Even though I have not used it, I'm assuming it works as well as the one in the rifle now. Hence, I gave it 5 stars for the fast shipment and the way it was nicely packaged when it arrived.