Bravo Company Manufacturing MCMR-13 Modular Rail AR-15 Handguard - 13.4"

21 Reviews

Out of Stock

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The freefloating Bravo Company MCMR M-LOK Rail eliminates external load on the barrel, reducing deflection for more accurate shooting. Featuring the same industry leading barrel nut and lock up design introduced on BCM's KMR handguard, the MCMR series of handguards delivers modularity for the M-LOK platform. Its proprietary patented mounting system (US Patent 8904691), includes a mechanical index to the 12-o’clock rail and positions mounting hardware to mitigate movement caused by heat.

  • 6061-T6 aluminum alloy
  • Steel barrel nut included
  • MIL-A-8625F, Type III, Class 2 hardcoat anodized
  • Inside diameter: 1.3”
  • Width: 1.5"
  • 13.4" Total length
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Accessory AttachmentM-LOK
BrandBravo Company Manufacturing
FinishHardcoat Anodized
Gas System LengthExtended Rifle
Handguard Length13.4
Inner Diameter1.30 in
MaterialAluminum - 6061-T6
Weight10.5 Oz
California Prop 65 warning

 WARNING: This product can expose you to chemicals, which are known to the State of California to cause Cancer and Reproductive Harm. For more information go to

Ratings & Reviews

21 reviews

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Another Win for BCM!


When BCM released this handguard I jumped on it. Having a 15" KMR on another build I couldn't wait to add another one in Mlok. I can't say enough great things about it! It is super light, nice and narrow, and feels great in hand. I liked it so much that I ordered another one (shorter) for a 14'er build I'm working on. I have a few favorites and the MCMR/KMR is an example of that!

Great BCM Rail!

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What a great rail! I used this as an upgrade to my existing polymer one that came with my rifle. It is surprisingly lightweight and slimmer then my original one. I was torn between this one and one from another manufacturer and ended up going with this one due to the diameter being smaller then the other. Very happy with this and it looks awesome on my rifle!

My go to hand guard/rail

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KMR was my go to hand guard rail on my better builds until BCM introduced the MCMR. My ARs don’t leave home without them. Solid, lightweight, well made and well priced. Have used many, but this is the one.

It’s legit

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Super light, quality looking part.

Great rail but......


Bought this rail and I truly like it. Makes all the difference in the world. Like they say, you have to heat and expand the metal to get it to go over the barrel nut. Mine was still so tight that Ill never be able to take it off with destroying it.

Quality snug fitting parts

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Quality snug fitting parts with great look!

Another awesome product from BCM

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Another great product from BCM. This handguard is small and light weight. The fit and finish is top notch. Make sure you have a heat gun to heat up the end of the rail to slide over the barrel nut.


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Very nice thermal fit rail

The best looking M-LOK handguard


I truly love this BCM hand rail. I have two of these. MCMR-13 and MCMR-15. The quality fit, attention to detail and styling are absolutely amazing. I believe it’s the best in the industry. Thank you Primary Arms for carrying them in stock.

BCM is just awesome.

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Lightweight. Makes a noticeable difference in weight and handling of an upper, even with a standard government profile barrel. Can only imagine what it would be like with a lightweight barrel. Lockup to barrel nut is TIGHT and sturdy. Will definitely buy again if the need arises.