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G10 XOS® in MLOK

(137 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

(137 reviews) Write a Review

137 Reviews Hide Reviews Show Reviews

  • 5
    Outstanding

    Posted by Dylan sheppard on Jun 17th 2021

    Got the dragon scales, aesthetically and functionally.... Im more than impressed. Highly recommend and will buy more!

  • 5
    G10 xos in mlok

    Posted by Rhett on Jun 16th 2021

    These scales are amazing. My only discrepancy is that there needs to be a 2 slot option for the Honey badger. 3 slot wont fit the bottom of the hand guard. Thusly, I ordered karve anchor and a single slot as well

  • 5
    G10 XOS™ IN MLOK

    Posted by MATTHEW FLEMING on Jun 15th 2021

    This product is a great finishing touch to My build. they work excellent at heat reduction and grip on my build. the fit and finish was also on point.

  • 5
    G10 XOS

    Posted by James Lang on Jun 8th 2021

    Another great product. I use mine in conjunction with the HTP Scales.

  • 5
    Grips that Grip

    Posted by Dustin on Jun 1st 2021

    These grips do exactly what they advertise. But the build quality and quality control set them apart from the competition.

  • 5
    Damn good

    Posted by Anthony on May 11th 2021

    Damn good surface to hold on to and lightweight

  • 5
    G10 XOS MLOK

    Posted by Chip on May 5th 2021

    First time buyer of RS products and I’m favorably impressed. Site is intuitive and easy to use, fast shipping; excellent customer service. The XOS fits flush on the free float foregrip of my Armalite AR-19 pistol. Quality material and machining on the scale itself and included hardware, exceptionally easy to install, they include an Allen tool, nothing else needed. You can tell they take pride in their craftsmanship and it interfaces well with their other products. I bought two XOS, one XOS-H, and the Karve-P. Installation was a breeze and rock solid. The Honeycomb design esthetic looks amazing and it’s highly functional and grippy. Easy to clean, outstanding design; overall an outstanding product.

  • 5
    Pricey, but worth it. Great texture to grip

    Posted by Jordan Gibb on Apr 26th 2021

    I was very skeptical when I first saw these at this price, couldn't imagine it could be worth it. I ended up getting 3 of the G10 rails in dragon just to try them out, and they're staying on the gun now. GREAT texture, and they're incredibly solid. I know I sound like a bot from the company writing this ad, but I'm actually giving some of the polymer ones to my dad for his birthday next week.

  • 5
    G10 XOS (Honeycomb-4 Slot)

    Posted by Liam on Apr 14th 2021

    Recently purchased 3 scales in the honeycomb texture along with the Karve-P. Firstly, this is an amazing quality product. Despite the prices being what they are, when you take them out of the box and feel them, you understand why. The scales feel very sturdy in the hands and they provide you with a great grip on your rifle without being overly aggressive on bare hands. After trying both the matrix and minidot textures, the honeycomb is an excellent medium between these two when it comes to overall grip. The karve is also a great addition to the scales and gives you even more shooting stability and recoil control. I run all of these on my police patrol rifle and they are extremely efficient without adding too much weight to your setup, which is very important to me personally. Paid about $250 for all 3 plus the karve, but once you get them on your rifle, you know it was worth the investment for what they offer.