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
    BCM BCG

    The BCM BCG drops in and functions well in my Ar 15. The only "complaint" I have, is that the bolt is very stiff in the bolt carrier when new. It takes quite a few cyclings of the action to loosen it up, so the bolt seats in the chamber properly. It passed the GO and NO GO head spacing checks.

  • 5
    first buildfirst build

    these products were recommended to me by a friend who is very knowledgeable about AR -15's. I am doing my first build and wanted to do it right with quality components

  • 5
    BCM BCG

    Great BCG!! Buy BCM and dont look back!

  • 5
    Best BCG ive used

    Ive been a big fan of Nickel boron BCGs but after using this one ill never go back same lower same ammo same amount and type of oil and this one always stay cleaner , first night out put 400 rounds thru it and it ran flawlessly

  • 5
    BCG

    Great looking BCG as always. Are these test-fired? Mine hand brass on the bolt face and carrier underside. No big deal and not a concern, just curious

  • 5
    Bcm bolt carrier

    This was for an ar that I'm building for a friend I got the same carrier in mine an have put it through the ringer it has cycled flawless an never jam even with cheap tulla ammo lol. Send me some averting stuff an I'll help I love the products an the staff always help just a phone call away

  • 5
    Bolt carrier group

    Great quality cycles flawless better than expected

  • 5
    Love this company!

    Quality + Amazing Customer Service = Awesome Buying Experience

    Plus, I love the extras they throw in like stickers, magazines, and catalogs. Shipping is quick and reasonably priced. Products are superior. This company nails it every time!

  • 5
    Only the best!

    Only the best never settle for less. When I put my life on the line, I Don't have to second guess if it is top quality. And I don't won't to die because I saved money . BCM thanks.