BCM® MCMR-13 (M-LOK® Compatible* Modular Rail)

MSRP: $200.00
Your Price: $189.95
(You save $10.05 )
(50 reviews) Write a Review
Stock Status:

Out of stock

BCM® MCMR-13 (M-LOK® Compatible* Modular Rail)

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 8.2 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 13.4"

Designed to be used with pistol length, carbine length, mid length, or Mil-Spec M16 rifle 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.***

50 Reviews

  • 5

    Posted by Danny on Jul 3rd 2020

    Its sleek, its comfortable, has excellent QC, and has an extremely snug fit. What more could you want?

  • 5
    bcm mcmr 13 inch handguard

    Posted by Edward marley on Jun 29th 2020

    Fantastic handguard. Spec is super tight and fit super well. Construction is great and super light overall. Took it out immediately after finishing the build and is honestly one of the best handguards I've ever used. Probably going to use BCM guards from now on

  • 5
    MCMR Handguard

    Posted by Shane on Jun 24th 2020

    I have (3) of these MCMR handguards, one being on my back up duty rifle and others for personal home defense.
    Best handguards in business, have a lot of rounds down range with them and they have held up to the abuse despite being very lightweight I was very surprised. Anything BCM made is of extreme high quality, and something I trust my life with on or off duty. THANK YOU!

  • 5
    BCM MCMR-13 Handrail

    Posted by Kurt Moore on Jun 21st 2020

    Another quality product form BCM, with the BCM Low Profile Gas Block the package rocks. Quick delivery.

  • 5
    Perfect handguard system

    Posted by Adam on Jun 9th 2020

    This is the best handguard that I have used to date. The mounting system is great and the install instructions are easy to follow. Does require a torque wrench and some specialty tooling to hold your upper, but it’s super easy to install either way. Handguard attachment is much better than the Midwest rail that this is replacing. I never did like how that rail mounted, but this one seems solid as a rock. Would recommend to anyone.

  • 5
    Amazing product.

    Posted by Hector Solano on Jun 9th 2020

    This is a well built hand rail/guard. Easy to install, easy instructions to follow.

  • 5
    13" MCMR

    Posted by SpartanB377 on Jun 4th 2020

    This is my first BCM Handguard and I have to admit, its better than I had expected. The tolerances are snug, the narrow diameter is very sleek, and the entire system is incredibly light even with the barrel nut. I'm looking forward to putting it through it's paces, but the initial impression is nothing but positive.

  • 4
    13 mlok handguard

    Posted by Don on Jun 4th 2020

    have not had enough time to test it but its light, was easy to install, and seems very solid. So far it has been easy to add accessories to, like a light and handstop.I can not say more cause I just out it on and have not even fired the gun with it on yet.

  • 5
    13” mcmr rail

    Posted by Kevin Cunningham on Jun 2nd 2020

    If you are worried about weight but want a strong rail system you can’t go wrong this rail.