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.***

61 Reviews

  • 5
    Barrell nut

    Posted by Darren on Oct 12th 2020

    Quality excellence as usual

  • 4
    Kmr nut

    Posted by Ryan on Oct 11th 2020

    I tend to replace these whenever I pull an old one off. They don’t hold up too well to the torque wrench with multiple installations. They do what they do well and allow the fore end to be swapped easily. For what they cost, buy a new one and curse less.

  • 5
    One of the Best...

    Posted by Anonymous on Aug 9th 2020

    This barrel nut and rail mounting systems are one of the best designs on the market. You can't go with BCM.

  • 5
    Barrel nut

    Posted by George dandrea on Aug 6th 2020

    I changed barrels and stripped the original nut I’ve had for a few years.Ordered a new fast shipping worked like a charm thank you.

  • 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.