BCM® KMR *ALPHA* 9 (KeyMod™ Free Float Handguard)

MSRP: $225.00
Your Price: $211.95
(You save $13.05 )
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BCM® KMR Alpha 9


All the advantages and features of Bravo Company's KeyMod™ Rail, now available in 100% aluminum

Manufactured from aluminum, it is lightweight yet durable. Also featuring a proprietary patent pending mounting, indexing and lock up system that mitigates 12:00 rail movement under heat generated from the barrel nut.


Handguard alone weighs 5.6oz!


1.3 Inner Diameter

1.5 OUTSIDE flat to flat.

Handguard flares forward (towards muzzle end) at the 3 and 9 O'clock positions approximately 1/4"

Actual length when measured to flare is 9.4"

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


Mounting hardware, 2.4oz, for a total of 8.0oz on a 9" rail.


The KMR Alpha is hardcoat anodized for corrosion resistance as well as to maintain a non-reflective finish.

The KeyMod interface system was developed by Eric Kincel (now the Director of BCM's product development team) to work in parallel with the current picatinny system. In many applications it will advance modularity past the current 1913 rail system.

The BCM KMR Alpha also allows for a larger range of modularity offering 4 different offset mounting positions between traditional 3,6,9, and 12:00 positions.

In the most basic of applications the KeyMod system allows for universal modularity between various manufacturers of accessories, and accessory rails. A big win for the trigger puller. As the industry advances the modular accessories will mount directly to the KeyMod instead of picatinny, allowing for a lighter, cleaner, and less bulky weapon system.

*Includes BCM KeyMod Sling Mount

Please note: Nylon/Polymer Picatinny rail sections are for NON-load bearing accessories only. For load bearing accessories, we recommend aluminum Picatinny rail sections. Do NOT exceed 20 in/lbs. when securing KeyMod Fasteners on Polymer accessories. Aluminum Picatinny rail sections may be torqued to 30 in/lbs

Installation manual for the BCM® KMR Handguard

WARNING: This product can expose you to chemicals including Cumene and Titanium Dioxide, which is known to the State of California to cause cancer. For more information, go to www.P65Warnings.ca.gov

***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.***

56 Reviews

  • 5

    These are very high quality rails. Extremely lightweight and comfortable. It’s a tight fit on the barrel nut, which is a good thing. Take your time installing it and follow the instructions, it’s pretty easy, just make sure you heat it up, also, make sure there are no burrs on the barrel nut after torquing it. Great product, I love it.

  • 5

    I love my new handguard its light weight shocked me, lighter than the polymer handguard that was on my rifle. Easy to install and love that it came with a QD sling mount to attached to the rail. Always lots of love coming from BCM.

  • 5
    Great hand guard!

    My 3rd Key Mod so yeah I like them. Used it for a 10.3 pistol build.

  • 5
    Very well made

    I could not believe how well this thing fits and feels. I will be buying this hand guard for every rifle I build.

  • 5
    Light weight keymod

    Very nice hand guard, now time to run it!

  • 5

    I ordered this for my new Saint, the fit and finish are perfect. Using proper tools, had no issues and have an extremely nice and tight fit.

  • 5
    Secure fit and confidence inspiring

    Bought this for my SBR and loving it! Fits perfectly and doesnt come loose even after hard use and lots of heat. Great design!

  • 5

    It's perfect, liked it so much on my MK18. Got another for my 10.5 300blk

  • 5
    Super Happy

    Put this one on my 10.5 barrel. Looks awesome, very lightweight, I like the smooth bottom and sides. If you follow the instructions, it will go together quickly and easily.