BCM® KMR *ALPHA* 10 (KeyMod™ Free Float Handguard)

MSRP: $190.00
Was: $190.00
Now: $179.95
(You save $10.05 )
(61 reviews) Write a Review
Stock Status: In Stock


BCM® KMR Alpha 10


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 6.2oz!

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 10.5"


Mounting hardware, 2.4oz, for a total of 8.6oz on a 10 rail.

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

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 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

61 Reviews

  • 5
    Best handguard you can buy

    Posted by anonymous on Jul 27th 2019

    It's perfect in every way. The fit and finish is world's above anything I've seen. As we all know, everything good in life is tight and this handguard is TIGHT. This will be my default for every rifle in the future

  • 5
    Love it, best rail

    Posted by William Cromer on May 8th 2019

    I bought this rail to go on a 10.3 inch 300 blk AR pistol. It fit perfect. It's light as a feather. Love it. Will be buying again

  • 5
    PSA on a Diet

    Posted by William Ricketts on May 8th 2019

    Wanted to have a more comfortable and hopefully lighter AR . Just more enjoyable too shoot. replaced the hand guard, BCM gas block and added a MFT stock. Much easier too shoot and went form a 7.5 + pound gun to 6 pounder. Feels solid and did not get too hot even after 200 rounds in 1/2 hour. Nice product, excellent engineering.

  • 5
    KMR Fanboy

    Posted by [email protected] on Apr 9th 2019

    The KMR handguard is quite simply the best AR setup out there. It is narrow, lightweight, the mounting system is rock-solid, and is of excellent quality and workmanship. Well worth every penny.

  • 5
    Must have item

    Posted by Ryan kennedy on Dec 21st 2018

    Light and strong! And easy to install

  • 5
    Customer review

    Posted by Kevin McCauley on Jun 9th 2018

    Review body is empty

  • 5
    Thoroughly impressed

    Posted by Timothy Thomas on Oct 27th 2017

    I ordered a 16" mid length barrel, and finished out with the KMR handguard, BCM gas block and A2 flash suppressor. Everything fit great, and lined up correctly. I followed all the instructions and had zero problems putting this together. Everything was delivered promptly. This gun shoots like a dream. I'm a fair shot, but this barrel made my groups tighter. Would not hesitate to buy from these guys again.

  • 5

    Posted by Johnny Amuso on Oct 27th 2017

    I love the hand guard, the way it looks and performs, only thing I didn't like is how hard it is to install in the barrel nut, it also seems impossible to get back off. Other than that not bad.

  • 5

    Posted by Bradley on Oct 27th 2017

    This handguard fits great and barely weighs anything. Fast shipping and a great product. I'll definitely order again on the next build