BCM® MCMR-10 (M-LOK® Compatible* Modular Rail)

MSRP: $190.00
Your Price: $179.95
(You save $10.05 )
(20 reviews) Write a Review
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BCM® MCMR-10 (M-LOK® Compatible* Modular Rail) Handguard

Featuring the same industry leading barrel nut and lock up design as originally introduced on BCM's evolutionary KMR handguard, the MCMR Series of handguards gives the shooter modularity in the M-LOK platform.

This proprietary patented mounting system (US Patent 8904691), includes a mechanical index to the 12:00 rail and positions mounting hardware to mitigate the movement caused by heat generated by the weapon system.


  • MCMR features M-LOK Compatible mounting system.
  • Free Float Handguard eliminates loads from barrel, reducing the deflection for more accurate shooting.
  • Precision Machined Aerospace 6061-T6 Aluminum Alloy, for high strength and lightweight.
  • Proprietary engineered profile offers additional cross sectional strength.
  • Steel Barrel Nut (same KMR, MCMR, and QRF series), to resist movement under heat.
  • Hard Coat Anodized per Mil-A-8625F, Type III, Class 2
  • Handguard alone weighs 6.6 oz
  • Handguard mounting hardware 2.3 oz
  • Includes BCM M-LOK Compatible Sling Mount, (FREE for a limited time)
  • 1.3" Inside Diameter
  • 1.5" Wide

Actual length when measured to flare is 10.5"

Designed to be used with pistol length, carbine length, or mid length gas systems; all with a low profile gas block.


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


Bravo Company MFG, Inc. US Patent 8904691

Please note: Nylon/Polymer Picatinny rail sections are for NON-load bearing accessories only (grips, hand stops, light mounts). For load bearing accessories (bipod mounts, sling mounts, vertical grips, barricade supports), we recommend aluminum Picatinny rail sections. Do NOT exceed 20 in/lbs. when securing fasteners on Polymer accessories. Aluminum Picatinny rail sections may be torqued to 30 in/lbs.

*M-LOK® is a registered trademark of Magpul Industries Corp.


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.***

20 Reviews

  • 4

    Posted by Anonymous on Aug 7th 2020

    Haven’t had a chance to install it yet but it seems to be durable despite weighing practically nothing. It would be nice it the barrel but was longer like the geissele barrel nut but the fit is so tight I don’t think it will go anywhere once in place and torqued down.

  • 5
    M-Lok rail system

    Posted by Michael B. on Jul 14th 2020

    An awesome product! The finish is clean, the weight is perfect. The install is a little tough but it's all worth it in the end with a little elbow grease and patience. The rail system in the end is extremely sturdy, in other words has no movement what so ever. I'm extremely proud of the purchase and anyone who decides to purchase this rail system will feel the same way too.

  • 5

    Posted by Richard Williams on Jun 18th 2020

    Quality, fit, and finish are top quality. Rock solid mounting solution. Light and functional. Everything you would expect from a BCM product. Would highly recommend

  • 5
    great rail

    Posted by Robert Fuentes on Jun 3rd 2020

    This hand guard is absolutely rock solid and soo light on my 11.3 build. it makes the front end so much easier to maneuver compared to others that I have used. Don't question it, just buy it for your next build!

  • 4

    Posted by Ethan Fiedler on Apr 21st 2020

    I really like the rail size and design. I do need to say though that it is extremely tight on the barrel nut. So much so that even with a heat gun it was no easy task to assemble. Also read the directions, if you put the rail too far back you cannot align the locking bolts and will damage them as well as the rail. I learned this the hard way.

  • 5
    10” rail

    Posted by Bob p on Apr 16th 2020

    Been using BCM charging handles and mod zero grips on all my builds. Now I will also be using their rails. Everything l have used from this company has been better than anything else I have tried. Thanks BCM

  • 5
    MCMR 10” rail

    Posted by Michael on Apr 3rd 2020

    Live this rail!! Replaced a LaRue 9” quad rail with this on an 11.5” rifle. Not only does it save weight, it looks and feels so much better. Installation was easy enough, fit is perfect, rock solid rail!!

  • 5
    Awesome handguard

    Posted by Daniel Knight on Feb 25th 2020

    It fits tight and feels great in the hand. Absolutely no complaints, especially for this price. I definitely recommend!

  • 5
    Perfect Product

    Posted by Joshua R. on Aug 20th 2019

    Originally had an upper put together and didn't really understand what I needed for rail length. Thankfully BCM offers a lot of their hand guards in various lengths. The one I purchase was the 10" length for the barrel that I have is a Ballistic Advantage 11.3". It's a close fit, but it still has clearance for me to swap out muzzle devices if need be. Communication, notification, and shipping services were superb.