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

MSRP: $210.00
Your Price: $199.95
(You save $10.05 )
(72 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.***

72 Reviews

  • 5
    Ar15 mlock handguard

    Posted by Pedro Bonilla on Aug 7th 2020

    Strong, perfect fit and finish, quality piece.

  • 5
    Simply the best

    Posted by Kent on Aug 7th 2020

    These are the best handguards available, period. I got lucky and found one in-stock on the BCM website when all other vendors were out of stock. Light, tight, comfortable, and durable. I tried to "mix it up" going with a competing, 6 o'clock tightening lightweight rail and they are all trash. Stop looking elsewhere and just buy these rails.

  • 5
    Top shelf low profile rail

    Posted by Scott Coleman on Aug 3rd 2020

    This is my go-to rail for a low profile type build. Very strong, low profile, fairly light weight and looks sharp. If you're lucky enough to find a BCM upper to match get it, they make the best uppers for accuracy IMO.

  • 5
    Best Handguard PERIOD!

    Posted by CJ on Jul 27th 2020

    Don't skimp on the cheap hand guards like I did. Many are made in China and it shows. I tried the BCM to see and now I am buying their 13" Handguard. It's that good!

  • 5
    Love it!

    Posted by Conor on Jul 10th 2020

    This handguard is solid and clearly well-made. Installation was simple and straightforward, but make sure you follow the provided instructions. The cross-bolt clamping mechanism is ingenious! This thing locks up solid and isn't going anywhere.

  • 5
    Best handguard ever!!!

    Posted by Shawn on Jun 30th 2020

    Used these on multiple builds, I love them and they fit very well and super comfortable on the hand. Definitely recommend buying

  • 5
    15' MLOK

    Posted by Morgan Griffin on Jun 30th 2020

    They don't make a better, tighter fitting hand guard.

  • 5
    Exactly what I was looking for.

    Posted by josh krempp on Jun 26th 2020

    This hand guard fits the vision i had in my head perfectly. It's low profile, low weight, incredibly durable, and looks like it spits freedom. The only way BCM could improve this handguard's freedom factor is by painting it red white and blue. I recommend this hand guard to anyone who enjoys their freedom, liberty and happiness. 10/10 made me happy.

  • 5

    Posted by Abram Sherman on Jun 25th 2020

    This rail is very slim coming in at just 1.5 inch in diameter, without sacrificing strength.