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Product Overview

Sold Individually

HTP® XOS® in M-LOK - New for Fall 2023 - Now offering a High Temp Polymer (HTP) injection molded version of our G10 machined XOS RailScales. HTP XOS scales are a 3-sided solution that provide more than twice as much grip surface in a similar mounting footprint to our traditional HTP Scales. Adding a 135º wing on each side of the panel allows for the HTP XOS to tightly wrap your rail, and provides one seamless grip area for unparalleled handling and heat protection. They are available in 4 popular industry colors: Black, Flat Dark Earth, Sniper Grey and OD Green. These are sold individually, and will allow you to outfit your firearm with even more added texture, grip and heat protection at a reduced cost. These will accommodate most popular M-LOK handguard rail systems, however please check the specs below to insure these will fit yours.

New HTP IR Material (NIR): Our HTP scales are heat stabilized and utilize 50% long glass fiber for high strength and and high rigidity properties. High HDT of 500º due to crystalline properties and glass loading. This also makes the HTP scales very isotropic to minimize warpage, the material is even suitable as a substitute for die cast metal parts. The new HTP XOS scales also feature a new Near-Infrared compliant upgrade to our material (NIR). The HTP NIR material was originally formulated for a recent military contract and we decided to carry it over to our commercial line of products as well. The IR additive absorbs Short Wave IR radiation (non-visible light), yet prevents the emission of longer wave IR radiation (visible light).  These properties make the material they are added to virtually invisible when viewed using night vision / FLIR equipment. Look for the “NIR” marking on the back of our HTP line. The new HTP NIR will be coming to the rest of our HTP product line by the end of 2024.

Ships Free and Made in USA

  • Quantity: Sold Individually
  • Mount Type: M-LOK
  • Footprint: 3.5-Slots
  • Length: 5.520"
  • Width: 1.150"
  • Thickness: 0.125"
  • Weight: 0.64oz w/ hardware
  • Material: HTP® NIR™ (Injection Molded Glass Filled High Temp Polymer)
  • Color: Black, FDE Tan, Sniper Grey, OD Green
  • Hardware: US Made 416 Stainless M-LOK Nuts
  • Fastener: US Made T20 Torx Fasteners w/ Nylon Thread Patch

Fitment Info - Fits rails with mounting flats of 0.678" or narrower including the following:

  • Bootleg Inc. CamLok
  • Dakota Tactical HK Series MLOK
  • Daniel Defense Slim
  • Daniel Defense MFR MLOK - DOES NOT fit the MFR XL Rail.
  • Fortis Night Rail
  • Geissele 4-Sided Rails (Mk4*, Mk8)
  • Geissele MK16 (URG-I)
  • HK Parts HK Rails
  • Hodge/FN Wedgelock
  • KNS Bren 805
  • Midwest SSK/SSM
  • Midwest G3KL/G3ML
  • Midwest Gen 2 Extended AK MLOK
  • Parker Mountain Machine Scar Bottom Rail
  • PWS Mod 1/Mod 2
  • Sig Sauer Canebrake SD 
  • Sig Sauer MCX-SPEAR LT - Only fits at 6 o'clock, DOES NOT fit at 3 or 9 o'clock.
  • Sig Sauer MCX-SURG SD Rail - Only fits at 3 & 9 o'clock positions, DOES NOT fit at 6 o'clock position. 
  • Sig Sauer MCX-SURG Low-Profile Rail - Only fits at 6 o'clock, DOES NOT fit at 3 or 9 o'clock.
  • Sig Sauer MCX Virtus SD 
  • Vltor Freedom

Does not fit:

  • Brownells BRN-180
  • Black Rain Ordnance MLOK
  • Daniel Defense RIS III 
  • Larue 2.0 Stealth MLOK 
  • Noveske NSR, NHR, NSRM
  • Radian Model 1
  • Radical Firearms MLOK
  • Sig Sauer M400 MLOK/Tread
  • Sig Sauer M400 X-Series SDI
  • Sig Sauer MCX Rattler Non-SD
  • Sig Sauer MCX-SPEAR (308)
  • Sig Sauer MCX Virtus Non-SD
  • Sig Sauer MPX Factory 4" & 8" MLOK Rail
  • SOLGW Wedge Lock MLOK
  • SOLGW M89/L89 MLOK
  • TriArc TriLok MLOK 



© 2024 RailScales LLC All rights reserved. RailScales®, HTP®, XOS®, XOS-H®, XOS-W™, HTP NIR™ are registered trademarks of RailScales LLC.

For all patents and trademarks, see


(9 reviews) Write a Review

9 Reviews Hide Reviews Show Reviews

  • 5

    Posted by Matt Jay on Apr 13th 2024

    Not sure why I got the HTP, because now I’m ordering g10s to replace them, but the HTP already look Amazing and they fit beautifully on my BCM MCMR rail

  • 5
    HTP xos scales

    Posted by David on Mar 6th 2024

    Great coverage honeycomb texture is perfect will definitely be buying more!!

  • 5
    The Best Rail Covers in the Industry.

    Posted by Martin on Mar 3rd 2024

    Built a 13.7 AR. Ran it for 300 rds hard and my Rosco rail was hot to the touch. I bought these scales in the dragon scales version and i am speechless. Quality is fantastic and the size was perfect on my 13 inch hand guard. Immediately ran another 300 rds hard like the first time and I went for another 300 rds without having to wear gloves. These guys make an amazing product and 100% using them for all my builds and recommending them to friends! Just buy them, you wont regret it.

  • 5

    Posted by Mark on Feb 22nd 2024

    Really this setup with the large is elite and one of the best I’ve seen how I found it was a random post on ig I did my research and found the company. Also as being in CA I have a featureless rifle so no broom stick handle forward grips. But let me tell you there’s nothing featureless about this grip combo paired with a HRT tactical light with no wires. And muah!

  • 5
    Dragon scales / P Grip

    Posted by Eric on Feb 22nd 2024

    Love the positive grip railscales give. I have used them on 4 different builds now. Will use in the future. Highly recommend.

  • 5
    Best Rail Covers On The Market

    Posted by Bradley on Dec 9th 2023

    Absolutely love these rail panels. I got the honeycomb version and could not be more satisfied. They provide good heat protection and excellent grip without being too aggressive on your hands. They work well with and without gloves. Going to be putting these on all my rifles.

  • 5

    Posted by Josh on Nov 25th 2023

    Adds a cool unique touch to the gun and works well as a grip

  • 5

    Posted by Bob on Nov 8th 2023

    Perfect!! That is all!

  • 5

    Posted by William Miller on Nov 8th 2023

    Excellent product!!! A must have for any build platform to take it to another level!