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
    Pleased all around

    I'm not going to rant about BCM quality. I haven't put enough rounds down range nor are any of you in the dark about their reputation. Simply put, this has been a solid experience from start to finish.

    The BCG along with a charging handle came quicker than I can mail a letter via USPS. Fairly amazed at that actually.

    The carrier group itself is flawless so far as I can tell. Inspected and installed with no hitch. Roughly 500 rounds in and I can tell you that the action feels smoother, the operation is perfect and if you are a fan of high flying brass, get ready to put casings in the lane next to you.

    My first experience with BCM and it is one that will surely have me coming back. Great value at a fair price. Bravo up!

  • 5
    Awesome product

    Great quality and unbelievable shipping. Ordered it on a thursday and received my package on monday. Great job BCM!

  • 5
    Built like a tank

    super high quality, and shipping was unbelievably fast.

  • 5
    FANTASTIC

    I put in this bad boy in my M&P15T and all I can say is WOW!!!. I fired .223 and 5.56 all day long 775 rounds to be exact and not a glitch. The shells landed in the same place. (the next county) This is the Carrier Group to buy. Highly recommend. BCM keep up the good work.

  • 5
    BCM Is Rock Solid

    I have been using BCM products now for about 4 years. Recently I used my SBR in the Magpul Dynamics Carbine 2 Course which I built with BCM components. 2100 rounds in 3 days- ZERO malfunctions and rock solid performance! BCM BCG's are probably some of the best on the market.

  • 5
    Thank you, Bravo Company!

    I ordered this part on Monday, and it arrived today (Wednesday). It's well made, and improved ejection quite a bit. No failures at the range this afternoon.

  • 5
    What's not to like

    I've owned and seen a number of different BCGs over the years. The only ones I've seen that have as heavy a phosphate on the BC are BCM are from LMT. The bolt itself is laser etched with "MPI" and "HP." Chrome looks heavily laid down, and rings made initial operation stiff (but no malfunctions). The combination of the spring, insert and donut on the extractor make reassembling it difficult. On the range, this translates to brass catapulting into the stratosphere. There may be BCGs out there that are as good as BCM's, but I don't think there are any that are better.

  • 5
    Awesome

    I went from using the stock M&P 15 bolt carrier group to this one....night and day difference....ejects the shells so hard they sometimes dent against the brass deflector...they still reload and shoot just fine

  • 5
    Greatness achieved one customer at a time

    I placed an order on 10/21/2011. Yes that is today. I have already got confirmation that the order is shipping. I will update this when the order arrives but I really do not need to do that as the products of BCM are top notch.