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
    Best BCG

    Just Buy it, No Questions asked. Best BCG on the market Hands own.

  • 5
    EXCELLENT!!!

    800 rounds in one 6 hour outing! Not a single FTF or FTE. Only lubed once before shooting and ran amazing. Would recommend this to anyone and I do. Love BCM products. They are proven.

    Not a comment bot CK_32 on calguns. Ill vouch for this comment.

  • 5
    BCG For Me

    200+ rounds with zero malfunctions. Heavier bolt feels nice. Spend the extra cash! You get what you pay for.

  • 5
    Very nice BCG

    I have one of these and an IonBond finish BCG from BCM. I absolutely love both. I've had this one a lot longer and have put it through a lot and I've never once had a single problem with it. The cam pin is finally starting to look pretty worn but I'm not worried at all since it's only a $5 part. The quality of BCM's BCG is excellent. You can't go wrong with it at all.

  • 5
    Wonderful

    This was most definitely worth it. Just out of the package I put into my stag and shot 120 rds with no pre-lube or cleaning of the factory oil on the bolt or anything. Shot every round flawlessly. (I cleaned it right afterward by the way) I goes to show you don't even need to do any kind of pre-maintenance to the bolt first. I have now had it over a couple weeks now and I have shot over 2000 rds with it thus far and the carbon cleans off smoothly. Great product once again from BCM.

  • 5
    Professional Product from Professionals

    After installing H2 buffers and still having some ejection and chambering issues time to time with some 7.5 builds. I installed a BCM bolt carrier assy, to the troubled uppers. No more problems! The fit and finish on these are carriers are pare to none. I will use nothing else in any duty builds. Great product!

  • 5
    BCM BCG

    Fine product, excellent workmanship, gas key correctly staked, and chrome lined for heat resistance and easier cleaning.

  • 5
    Top Quality!

    This BCG is amazing. I installed it in my Stag 2T, along with a H buffer, and my rifle ran like a champ. The extra weight of the carrier and buffer ran smooth, and it didn't eject the empties into the next county, either. What else can I say? Full mil-spec quality, at a lot less than you'll spend elsewhere. Bravo Co. has a customer for life!

  • 5
    BCM Bolt Carrier Group

    You can't go wrong with a BCM BCG top tier quality, mid tier price.