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
    Nicely Machined

    This bolt carrier group was recommended by a friend for my new build. I was very impressed with the smoothness of the operation. This BCG is a perfect fit for any high end rifle.

  • 5
    Great BCG for my middy build

    Bolt carrier group came in the mail very quickly/Priority mail. Great staking job on the gas key, very solid material and workmanship. I combined it with a cold hammer forged BCM 16 inch barrel and everything mated up great. Go/no go gauge checked out and the rifle runs like a gazelle. Very smooth products. Also went with the low profile BCM gas block and mid length gas tube. Mod 0 comp on the barrel completed my upper. Extremely happy with BCM products, shipping speed, and attention to detail. Helpful customer service (via email) as well.

  • 5
    Excellent as always.

    I own several of the BCM bolt carrier groups. All of them have worked flawlessly. In my opinion, it's the best bolt carrier on the market.

  • 5
    5 Star BCG...

    Great product, good people... Happy shooter. Just buy it!

  • 5
    BCM Bolt Carrier Group (MPI) - Auto

    great fit and finish. i dont run anything else except an M16 BCG.

  • 5
    BCM BCG

    Excellent quality as expected

  • 5
    Another great bolt carrier group from bcm

    Couldn't be more satisfied with my bolt carrier group. It functions just like it's hope and has ran malfunction free so far.

  • 5
    Reliability at its finest.

    This bolt is as fine a bolt as you could ever want in a DI gun. Bolt comes ready to drop in and is well made with great fit and finish. A good product from a great company! It's what you'd expect from a business owned by a Marine.

    Semper Fi.

  • 5
    BCM BCG

    I am very pleased with this bolt carrier group. I specifically choose BCM because I know that they get it right. It's a gun company by shooters for shooters. And this translates into the quality and accuracy of their work. The gas key is staked very well, it has a solid phosphate coating, (which is kinda rough but standard for phosphate), chromline etc.. Just as the product description says. I just want to run as many rounds through it as I can afford . Buy it. You won't be disappointed