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

MSRP: $200.00
Your Price: $189.95
(You save $10.05 )
(32 reviews) Write a Review
Stock Status: In 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.***

32 Reviews

  • 4
    Very good quality

    Posted by Jason Wade on Sep 3rd 2019

    I haven't installed this yet thus missing one star. I didn't feel it was fair to right highest without having tested this. It is made very durably and of excellent quality. I have no doubt it perform past expectation.

  • 5
    Customer review

    Posted by Dustin Jennings on Aug 17th 2019

    It fit extremely snug, no need to worry about it coming loose at all.

  • 5
    BCM MCMR-13

    Posted by Mark Donley on Aug 6th 2019

    I like the products at BCM. high quality

  • 5
    Great handguard, excellent method of attachment

    Posted by Mike T on Aug 6th 2019

    My favorite part about the mcmr is how it attaches to the barrel nut, very stable and not able to walk out over time or under recoil

  • 5
    Great Customer Service

    Posted by Leonardo Gonzalez on Jul 17th 2019

    Going into this transaction, I already knew the quality of the product would be excellent. What pleasantly surprised me was the quality of the customer service. This is my first build and the BCM guys have been extremely patient and thorough with me. BCM has earned my future business.

  • 5

    Posted by Travis Thornton on Jul 17th 2019

    By far the best experience I have had with ANY company! Impressed with the fast shipping and high quality products. I will be using BCM products on all my builds.

  • 5
    Customer review

    Posted by Peter Mogl on Jul 1st 2019

    Review body is empty

  • 5
    This thing is amazing.

    Posted by ronald burgin on Jun 4th 2019

    I will use no other rails!

  • 5
    Great Rail

    Posted by anonymous on Jun 4th 2019

    Great looking rail and the fit was excellent. Was a little hesitant about installing this myself but the directions were very precise and I had it installed in about an hour.