BCM® MCMR-15 (M-LOK® Compatible* Modular Rail)

MSRP: $210.00
Your Price: $199.95
(You save $10.05 )
(51 reviews) Write a Review
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BCM® MCMR-15 (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 9.2 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 15.0"

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.***

51 Reviews

  • 5
    Customer review

    Posted by Bryan Robinson on Oct 6th 2019

    Review body is empty

  • 5
    Nothing less than machining perfection.

    Posted by Matt Partovi on Aug 20th 2019

    Not only is the BCM rail a thing of beauty but utter perfection in machining. The tolerance between the rail and the barrel nut is so tight that it requires heat to fit but man it makes for a solid point of attachment. I am very happy with the look and the feel. You won’t regret purchasing such a professional price of equipment.

  • 5
    From zero to hero

    Posted by Alex on Aug 20th 2019

    Once properly installed this took my “gun show special” AR to the next level. The mounting system really secures it to the firearm and makes it feel like a $1000 dollar rifle! Would absolutely recommend this!

  • 5
    Customer review

    Posted by Stoney Grimes on Aug 7th 2019

    Review body is empty

  • 5
    MCMR 15 M-LOK

    Posted by Robert Chavera Jr on Jul 24th 2019

    Great looking, lightweight, durable and quality product from BCM!

  • 5
    Customer review

    Posted by James Hendricks on Jul 17th 2019

    Same. As above. Excellent. Product

  • 5

    Posted by Daniel Dupuy on Jul 17th 2019

    Rail went on to my billet upper excellent with no issues. Lost sharp as hell too. Arrived in perfect condition. Great job guys!

  • 5
    BCM MCMR-15 (M-LOK® Compatible* Modular Rail)

    Posted by JEFF KING on Jun 4th 2019

    Very nice quality. Good clean lines. Nice, very nice.

  • 4
    Good feel

    Posted by Robert DeBoer on Jun 4th 2019

    I've install various forms of free float hand guards, from the early 4 side picanny paper weights to this. While the price may seam a little bit for some, its quality and weight make it work it. In addition, the way it is designed to attach to the upper receiver, there is no need to worry about slop or wobble.