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

MSRP: $210.00
Your Price: $199.95
(You save $10.05 )
(272 reviews) Write a Review
Maximum Purchase:
20 units
Stock Status:

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

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.***

272 Reviews

  • 5
    15” KMR Handguard

    Posted by Brian B. on Feb 28th 2021

    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

    Posted by Scott Fuller on Jan 25th 2021

    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

    Posted by Vance on Jan 11th 2021

    I use BCM for all my AR builds.

  • 5
    KMR handguard

    Posted by Timothy Thomas on Nov 29th 2020

    My second one. I love it.

  • 5
    Looks really good love it

    Posted by Kyle Ruthenberg on Nov 18th 2020

    Really nice rail you get what you pay for

  • 5
    Best on the market

    Posted by Daniel Chamberlain on Jun 25th 2020

    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

    Posted by Gregory Ange on Jun 3rd 2020

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

  • 5
    15 kmr handguard

    Posted by Donald Ledford on May 19th 2020

    very nice some what hard to in stall my first bcm hand guard I will be using bcm handguard from now on

  • 5
    This is the second KMR ALPHA 15 rail I’ve bought one for my colt one for my smith and Wesson fits both like a glove

    Posted by Jon Bales on Apr 27th 2020

    Great addition for anyone wanting forearm attachments