BCM® KMR Barrel Nut

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Barrel nut for your BCM® KMR, MCMR, or QRF Handguard


  • KMR Barrel Nut

The KMR barrel nut will fit over all mil-spec diameter barrels (max of 1")

****This product does NOT include the BCM® Handguard. ****

***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.***

42 Reviews

  • 5
    Use BCM Tool

    Posted by O’Charlie on Jul 4th 2020

    So, I decided to pull the trigger and build my own AR. Friends of my pointed me to BCM products due to their reliability and just flat out coolness. During my build I decided to use some other tool to get the barrel nut off while following the handguard instructions. Boy was I wrong! The other tool caused some really nasty burrs and almost made the barrel nut not come off. Anyway, besides that, this barrel nut is great. Works well with BCM branded handguards. Just remember, use the BCM barrel nut tool

  • 5
    kmr nut

    Posted by Roberto Cabrera Jr on Jul 1st 2020

    excellent design and easy to use

  • 5
    Barrel Nut

    Posted by Ian a Bailey on Jun 5th 2020

    BCM what else can I say Great product.

  • 4
    Good Product, Easily Stripped.

    Posted by Salim on May 20th 2020

    I am a big fan of BCM and their products. I recently ordered a handguard for a build , shipped within the same day. Unfortunately the barrel nut is easily stripped the by using the provided wrench. Had to buy a replacement barrel nut just FYI. Also BCM if you actually read these comments we would like an OD GREEN BCG, that would be HOT

  • 3
    BCM Barrel Nut

    Posted by Mike on Apr 22nd 2020

    easy to install and you don't need to time it for the foregrip to fit. It's a little awkward using the wrench and you have to be very careful getting the wrench on straight or else it can damage the slots.

  • 5
    Good replacement

    Posted by Curtis Hawkins on Jan 17th 2020

    This was a replacement for my original barrel but which I ruined trying to fit a piston system that did not really work with my BCM rail system as it was supposed to. Have to be sure to take your time lining up the barrel nut wrench on this as well or you can easily mar the notches in the nut making it unusable. Other than that this barrel nut is easy to install and does not need to be timed to fit your gas tube. Another well engineered part from BCM.

  • 5
    Customer review

    Posted by Colton Rhodes on Oct 26th 2019

    Review body is empty

  • 5
    Customer review

    Posted by Jacob Hamel on Aug 30th 2019

    Review body is empty

  • 5
    Quality product

    Posted by Chad Walker on Aug 20th 2019

    I’m glad a replacement nut was so inexpensive since I ruined my original one between builds.