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G10 XOS® in MLOK

(140 reviews) Write a Review
$61.00
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RailScales 4-Slot Dragon TerraCore® G10 XOS® & XOS-H® M-LOK Scales, Karve-P® FDE M-LOK Hand Stop, QDX® Sling Mount | 14.5" 5.56 URG-I Upper, Geissele Mk16 DDC Rail, Daniel Defense 14.5" 5.56 Gov Barrel, L3Harris NGAL Laser, Surefire M640U-Pro Light w/ CSP-07 Switch, Surefire 4-Prong 5.56 SOCOM Flash Hider w/ Surefire SOCOM556-RC2-DE Suppressor
UPC:
854417008254
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Product Overview

Now shipping with our new custom Torx T20 fasteners!

Sold Individually

XOS® in M-LOK - An evolution of our traditional G10 machined RailScales, XOS Scales are a 3-sided solution that offer twice as much grip surface in the same mounting footprint. Adding a 135º “wing” on each side of the panel allows for the XOS to tightly wrap your rail, and provides one seamless grip area for unparalleled handling and heat protection. CNC machined out of high quality US made Black FR4 or our brown terrian colored TerraCore (commonly known as G10), our scales provide an unmatched barrier against heat transfer. Available in four popular textures and varying lengths, these scales allow for multiple setups no matter how much rail space you have available. They will accommodate most popular handguard rail systems, however please check the specs below to insure these will fit yours. 

TerraCore complements our line of Terra Bronze anodized and FDE polymer components as well as third-party branded tan anodized or Cerakoted rail forends. Unlike coating or painting options, our TerraCore scales are colored throughout and remain so after CNC machining operations. Offered in the same patented textures and resilient heat protection options you've come to expect. We are excited to introduce TerraCore XOS scales to our lineup.

Ships Free and Made in USA

  • Quantity: Sold Individually
  • Mount Type: M-LOK
  • Footprint: 3-Slots, 4-Slots
  • Width: 1.165"
  • Thickness: 0.125"
  • Length Dimensions: 3-Slot - 4.724", 4-Slot 6.300"
  • Weight: 3-Slot - 0.64oz, 4-Slot - 0.82oz (w/ hardware)
  • Material: FR4
  • Color: Black FR4®, TerraCore®
  • 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:

  • AAC Teardrop
  • ADM MLOK
  • BCM KMR/MCMR
  • Bootleg Inc. CamLok
  • CMMG KeyMod/MLOK
  • Dakota Tactical HK Series KeyMod/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 USA MR556 A4 M-LOK Rail - Only fits at 6 o'clock, DOES NOT fit at 3 or 9 o'clock.
  • HK Parts HK Rails
  • Hodge/FN Wedgelock
  • LMT MRP-L MLOK
  • 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 
  • SLR AK ION
  • Vltor Freedom

Does not fit:

  • Brownells BRN-180
  • Black Rain Ordnance MLOK
  • CZ BREN 805
  • Daniel Defense RIS III 
  • Geissele MK18 MLOK
  • KAC URX 4 KeyMod/MLOK
  • KDG MREX SCAR Rails
  • 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-SPEAR LT SD Rail 
  • Sig Sauer MCX Virtus Non-SD
  • Sig Sauer MPX Factory 4" & 8" MLOK Rail
  • SMOS Arms GFY MLOK
  • SOLGW Wedge Lock MLOK
  • SOLGW M89/L89 MLOK
  • TriArc TriLok MLOK 

 

 

© 2025 RailScales, LLC. All Rights Reserved. RailScales®, XOS®, XOS-H®, Black FR4®, TerraCore®, Terra Bronze® are registered trademarks of RailScales LLC.

For all patents and trademarks, see www.railscalesip.com

Reviews

(140 reviews) Write a Review

140 Reviews Hide Reviews Show Reviews

  • 5
    G10 dragon scales

    Posted by Jarrod on Jun 21st 2025

    All I can say is you get what you pay for and will not be disappointed

  • 5
    Pricey? Yes. Worth it? Yes.

    Posted by BT on Jun 5th 2025

    Yes the G10 is pricey, but dang, it is worth it. Other polymer alternatives I have tried (a few different types and brands) simply do not compare, both cosmetically, and tactilely. The texture is pure money on the G10. The material itself has a unique texture that both feels better, and grips better than polymer. If you're on the fence, just get the G10. You won't regret it.

  • 5
    Awesome

    Posted by Robbie Shew on May 14th 2025

    Amazing feel and they look great!!

  • 5
    G10 scales and karve

    Posted by Joseph a brooks on Mar 26th 2025

    This is my 4th rifle I have equipped with rail scales. I will say you get what you pay for and these so far have been excellent. I will continue to do business with them great products.

  • 5
    Perfect texture

    Posted by Jacob H. on Jan 9th 2025

    Texture is the perfect blend of grip and comfort.

  • 5
    Excellence

    Posted by J M on Dec 15th 2024

    Installed my XOS Rail panels and optimized the feel of the controls for my rifle. Grip is essential with barehands and I'm certain it's even better with gloves on. Highly recommend for civilians and professionals.

  • 5
    Love the wrap around, on two sides better than many flats

    Posted by Gary Brackin on Oct 24th 2024

    I love having one wrap around the right, and around the left. I had used other brands with flats going all around the barrel. And i much prefer one flat on the bottom and these two wrap arounds. It lets air around to cool the barrel, but keeps you from getting burned. Best design ever!!!

  • 5
    Best customer service/great product

    Posted by Gabriel Ramirez on Sep 22nd 2024

    Had the best experience with this company and their product. I ordered rail scales but made a mistake on my end and literally the moment I contacted them they reached out with amazing customer service to elaborate on a few questions I had. I ended up ordering some more products from them and got quick shipping, the whole experience was amazing. The scales themselves are 10/10 fantastic they give the rifle such a nice feel and texture. Super easy to mount and honestly the attention to detail they put into making these is fantastic. Thank you!

  • 5
    XOS G-10 RailScales

    Posted by Dave Evans on Aug 21st 2024

    These are the best products made of this type. I am buying for all my railed rifles. I will be purchasing them until they replace the Magpuls and other Rail covers I have used in the past. Great Job RailScales! One suggestion would be to produce a 1 and 2 slot XOS G-10 Scale.