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
    BCG

    Perfect as usual. You guys shipped on a Saturday and the package was here Monday. That's why I bring my money to the best.

  • 5
    All Good

    As I expected,the quality of this BCG appears to be good in all aspects.This component looks to be every bit the quality as my last BCG from ( Colt ). I trust BCM for quality,keep up the good work

  • 5
    BCM BOLT CARRIER GROUP

    Item is as described. Very fast shipping. Installed very easy in my patrol rifle. Haven't shot yet but I'm sure this piece will live up to its reviews. Very happy.

  • 5
    Excellent serivice!

    I had a couple questions I sent via email and BCM got back to my questions very quick thanks for that. The product was to my door step in two days, awesome. The bolt carrier group is the best quality I have seen yet can't wait to order more BCM parts.

  • 5
    BCM BCG

    I purchased the BCM BCG for my new BCM mid length build. This is my first BCM rifle and I am very impressed with the quality and finish of their products. The BCG is very well made and my research shows it is rated as one of the best money can buy. Buy BCM with confidence.

  • 4
    Review

    Web sight was slow to update. Had to exit transaction and restart the purchase. Other than that it went well. Very pleased with bcg. Looks very well made, can't wait to shoot it.

  • 5
    Couldn't be happier

    Haven't gotten the chance to test this out yet, but from the look and feel of it, I already prefer it to my Troy BCG. Will be swapping out soon.

  • 5
    BCM Bolt Carrier Group (MPI) -Auto

    This BCG is all that it is said to be and works flawlessly.

    Somewhat lessens felt recoil as a result of it's slightly greater mass vs the standard AR15 BCG.

    All said though, please stop using USPS for shipping as they are terrible b

  • 5
    A++

    A++ fast shipping, quality products, would order from bcm again