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Kinetic Development Group Scar Mrex Mark II M-LOK Handguard
As Low As $258.33 Save Up to 28%
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Expert Review

Superb Scar Upgrade

by Andrew, Gear Expert from WI, United States Written on March 14, 2023
Added the 4.25 inch MREX to my Scar 17 and it's the perfect fit. It's the right amount of additional rail space without being too front-heavy. Installation was a lot easier than I thought it would be. One thing to keep in mind is that there is a mounting screw on the underside of the rail that limits the placement of under barrel attachments. This is a SCAR flaw, not a flaw with this rail system. Overall the Mrex provides a sleek and modular rail system that significantly increases overall rail space compared to the factory picatiny rails on the Scar 17. I have long been a proponent of keeping icon firearms like the SCAR in their original form. However, I went out on a limb to give the Mrex a try and I am completely sold.
Most Helpful Positive Review KDG Mrex Mark II M-Lok rail
Fantastic rail for the SCAR 17. I’ve always loved my SCAR, but the platform doesn’t offer much in the way of accessory mounting options. This rail really opens up the rifle to a lot of different configurations. Plus, it looks awesome and it’s extremely lightweight.
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Great product, not great instructions

by Jordan P, Verified Owner from TX, United States Written on June 1, 2026
Optics planet is great and the item came quickly and at a lower price than anywhere else. The rail was fairly easy to install, but the instructions are pretty lack luster. You'd think paying such a high price for a rail would come with video instructions from the manufacturer. Otherwise I do quiet like the rail.
Would recommend: Yes
Was it helpful to you? Yes | No

high quality and amazing.

by Lito, Verified Owner from WI, United States Written on May 5, 2026
Quality is great. easy install looks amazing on gun.
Would recommend: Yes
Was it helpful to you? Yes | No

the best rail

by Ricardo, Verified Owner from TX, United States Written on April 18, 2026
I like this real because of its size and engineering finish. It’s easy to install and then once you have it it’s smooth and has a great surface. I highly recommend.
Would recommend: Yes
Was it helpful to you? Yes | No

Scar Mrex mk2 handguard

by fxaldo01, Verified Owner from FL, United States Written on March 31, 2026
Excellent quality, low weight. Enough m-lock slots for my accessories. Very functional.
Best Used for:
  • Tactical
Would recommend: Yes
Was it helpful to you? Yes | No

Adds a lil weight and a TON of useable space

by DrSigmundFraud, Verified Owner from WI, United States Written on March 29, 2025
Installation isn’t overly complicated (definitely need a heat gun!) and the SCAR now looks and feels better than stock, they should be like this from the factory. Instant upgrade to MLOK and the ability for a far forward hold makes the rifle more comfortable and stable. Feels solid and very well made, the fit is EXACT! Pricey but worth it in my eyes to modernize the platform in looks and usability.
Pros:
  • Look
  • Installation
  • feel
  • MLok
  • build quaity
Cons:
  • Slight weight increase
Best Used for:
  • MLOK
  • Modernization
Would recommend: Yes
Was it helpful to you? Yes | No

mrex mark II

by jk, Verified Owner from MI, United States Written on October 10, 2024
The mrex rail fit great and was a huge upgrade to my scar.
Would recommend: Yes
Was it helpful to you? Yes | No

Easy install, lightweight

by gsk452, Verified Owner from VA, United States Written on October 4, 2024
Install was very easy and it dramatically increases the functional rail space on the SCAR
Would recommend: Yes
Was it helpful to you? Yes | No

must have for a scar.

by luke, Verified Owner from NC, United States Written on August 9, 2024
If you have a scar and want more rail space this is a must!!
Would recommend: Yes
Was it helpful to you? Yes | No

PACKAGING ISSUES

by Jollyrodger, Verified Owner from OH, United States Written on February 14, 2024
Handguard arrived with screws, no lock tight, no instructions the bigger issue is the giant optics planet sign on the outside of the box. Box arrived had been clearing torn open not damaged during shipping and the tape that closes the handguard box had the tape that keeps the box closed was neatly cut. Had this been an expensive item I am not sure it would have ever made it. Discrete packaging needed just my opinion. Thanks
Pros:
  • Fit and finish was good easy to install thanks to the internet
Cons:
  • Time will tell if mounting solution will hold up to abuse
  • Time will tell if mounting solution will hold up to use and abuse
Best Used for:
  • SCAR 16 and 17
Would recommend: Yes
1 of 1 found the following review helpful.
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Scar 17s hand guard extension

by Jdubbs21jd, Verified Owner from PA, United States Written on September 29, 2023
Easy install, solid light weight product. Another great buy from OP
Pros:
  • light weight
Cons:
  • None
Best Used for:
  • Stability and accessory mounting
Would recommend: Yes
Was it helpful to you? Yes | No
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Last updated 2025-11-12 UTC.