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.***

Videos Hide Videos Show Videos

1247 Reviews

  • 5
    I have been using them for years, you can not get any better then BCM bolts

    Fantastic company

  • 5
    As Good As They Say

    Very well built. Machined beautifully. No issues so far.

  • 5
    First build

    As always incredible B.C.M. product. My first build reliably has shot every single time and looks incredible thanks to B.C.M. complete upper. I like the fact when my dust cover is open you see that quality reassuring name through the ejection port. Thank you B.C.M. for amazing products and I got everything super fast.

  • 5
    Use on all my builds

    I currently just started using these are all my builds they run flawless, if not the BCG the bolt assembly cant go wrong.

  • 5
    Bcm bcg

    Great product, staked very nicely, and couldn't be happier. You really can't go wrong with bcm

  • 4
    Top notch

    This is my first build and I'm highly impressed with the quality.

  • 5
    BCG

    Best BCG out today!

  • 5
    Vickers tactical recamended

    Built a 300 blackout. This bolt moves smooth as glass and hasn't let me down. Very pleased and i will be using bcm again

  • 5
    BCM Bolt Carrier Group

    BCM is very high quality and the bolt carrier group has run flawlessly so far, although I have only put 240 rounds through it as of this review.