BCM® KMR *ALPHA* 15 (KeyMod™ Free Float Handguard)

MSRP: $250.00
Your Price: $234.95
(You save $15.05 )
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BCM® KMR Alpha 15


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 8.6oz!


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 15.0"

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


Mounting hardware, 2.4oz, for a total of 11oz on a very long 15 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

***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.***

277 Reviews

  • 5
    15 inch key mod alpha hand guard.

    Great guard. Everything went together as advertised.

  • 4
    BCM KMR Alpha 15 Handguard

    The Bravo company KMR Alpha handguard is exceptionally well built and fits well on every AR-15 upper I've used it on. My only complaint is that the installation tool to attach the barrel nut tends to slip out of the notches in the barrel nut, which may damage the edge of the notches, making them unsightly, but certainly not unusable.

  • 5
    15” KMR Handguard

    Tight fit, but following the directions and heating the barrel nut of the handguard allowed it to slide on with minimal effort. Nice and thin; much better than the old quad-rail handguard that it replaced. Superior product that I’ve come to expect from BCM.

  • 5

    I ABSOLUTELY LOVE THIS HANDGUARD!!! I waited a long time to get this handguard and it is EXACTLY what I wanted! The length, the feel in my hand, the mounting system and the attachment system are top notch, not to mention my weapon system looks absolutely stunning now!!
    Thanks BCM you are a great high end company!!!

  • 5
    Great craftsmanship

    I use BCM for all my AR builds.

  • 5
    KMR handguard

    My second one. I love it.

  • 5
    Looks really good love it

    Really nice rail you get what you pay for

  • 5
    Best on the market

    I've built around 4 of these weapons now, and I always go with the BCM KMR Alpha. The cost to quality ratio is the best there is. Light, durable, perfect: the three words I'd use to describe these rails.

  • 5
    BCM KMR 15 inch Handguard

    Fast shipping . High quality. Couldn't be more pleased.