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
    Excellent as always

    The only BCG I run in any of my AR's. I've purchased several of these over the last couple of years from BCM and couldn't be happier!

  • 5
    Bolt

    Best in the business

  • 5
    As expected

    I have tried many bolt carriers. Honestly now a days there are not many out there that you can consider bad BCG's. Yet, BCM is a company that brings quality and it shows the moment you unpack your item. The extractor is solid and seems beefier than others. I am not an expert but it seems like it.

  • 5
    Couldn't ask for anything better

    It looks very slick performs to the quality of BCM

  • 5
    Great BCG

    I love that this BCG is 100% milspec and includes the upgraded spring, black insert, and the o-ring found on the Mk 18 AR's in use with SOCOM.

  • 5
    BCM bolt carrier group

    Excellent service and product. Quick delivery. Thanks for the extra stuff in the box, nice surprise. Your reputation for excellence is well deserved. I will be a long term/returning customer.

  • 5
    BCM Bolt Carrier Group

    Excellent product!

  • 5
    Quality Can't be beat.

    As always BCM delivered outstanding products. You can buy other brands for higher prices and lower prices, but you cannot beat BCM's Quality to Value ratio. My BCM rifles now have complete spare parts.

  • 5
    As expected

    Great product, great service, great delivery time.
    Thank you.