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

MSRP: $230.00
Your Price: $214.95
(You save $15.05 )
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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

***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.***

87 Reviews

  • 4

    I love this handguard but I bought it for a 10'5" pistol and it's a little long. The flash suppressor is recessed inside the handguard about 1/2" and I had to remove the handguard to torque the flash suppressor. I don't really think it's a big deal as the porting is outside of the KMR.. I have nothing but praise for every BCM product I own and I'll probably put this handguard on a 14.5" build I'm about to start.

  • 5
    o BCM® KMR *ALPHA* 10 (KeyMod™ Free Float Handguard

    My 4th BCM handguard. The ABSOLUTE BEST!

  • 5

    Awesome handrails, light compared to other similar items. Installation was a tight squeeze but fits, perfectly would buy it all over again.

  • 5
    KMR ALPHA 10”

    I recommend this product highly....I was looking for a way to lighten the load on my 14.5, so I chose the Alpha 10.....I love the ability to grasp the hand guard more thorough, thus improving my accuracy...The weight of the rail in my opinion is equivalent to holding the weapon without a magazine ..I was really pleased with the weight and streamline feel. Ii use the MK18 platform For my wife as her to go to rifle for home defense because she’s sooo small ..yet ..she always complains about the weight of the KAC RAIL...But not for long ...., good job BCM!!

  • 5
    Best handguard you can buy

    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

    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

    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

    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

    Light and strong! And easy to install