Nitride MPI 5.56/.223 Bolt Carrier Group (BCG)

8 customer reviews


In stock


Nitride MPI 5.56/.223 Bolt Carrier Group (BCG)

Product Specs:

  • .233/5.56 NATO
  • Salt bath nitride finish
  • M16 cut
  • 9310 steel carrier
  • Carpenter 158 steel bolt
  • 4140 steel extractor
  • MIL-SPEC O-ring
  • MIL-SPEC gas rings
  • 4140 steel cam pin
  • 8740 steel firing pin with hard chrome finish
  • Magnetic particle inspected
  • Proudly made in the U.S.A.

Additional information

Weight 6270317096 g

8 reviews for Nitride MPI 5.56/.223 Bolt Carrier Group (BCG)

  1. Shawn (verified owner)

    Very good price.

    Looks identical to the $80 one I bought. Definitely worth the price if your doing a budget build. Fast shipping too. Took only a couple days.

  2. D


    Very nice

  3. Mark Myers

    Good value. Seems to work just as well as other higher cost bolt carrier groups.

  4. Tomas Ferguson (verified owner)

    It just arrived yesterday with the 20″ barrel I bought from KM Tactical as well. Once all the parts I have ordered arrive, I will build it. So far, it appears to be in great shape. It looks really nice

  5. Tomas Ferguson (verified owner)

    Bought it back in May when it was listed for $64.99, along with a 20″ barrel from KM Tactical. This BCG runs flawlessly. It’s great. It seems to run just as well as the standard issue ones I carried in the military.

  6. jeffrey spiconardi (verified owner)

    Another fast shipped great priced part from KM , during a panic run on all things 2A no less. Budget BCG looks like will function fine.
    Bolt lugs are rounded like most budget BCGs gave 4 stars because bolt wasn’t marked MPI.

  7. Tim Bretz (verified owner)

    You can’t beat these for the price! Also, they’ve been nitrided, which gives them added anti-corrosion properties, as well as hardening them, making them more durable, which will extend the life of the BCG! Lastly, they’ve been MPI (Magnetic Particle Inspected) These are a no-brainer!

  8. noah1home (verified owner)

    I got this on sale for $60 you cant find a better deal anywhere. The BCG looks great and performed well. I took apart, cleaned and oiled it before installation. Very happy with this purchase. Shipping was fast. I contacted support for a issue with tracking number and received an email back asap. This was my first order with KM Tactical. I’m very pleased.

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