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G10 XOS-H® in MLOK

(82 reviews) Write a Review
$61.00
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RailScales 4-Slot Dragon TerraCore® G10 XOS-H® & XOS® 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:
854417008346
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Product Overview

Now shipping with our new custom Torx T20 fasteners!

Sold Individually

XOS-H® in M-LOK - This variation of our traditional G10 XOS Scales offer the same great features, but add an accessory cutout that partners seamlessly with other RailScales products to give you multiple modular options that best fit your shooting style. While most commonly used at the 6 o’clock position with our Karve, Karve-P, Anchor, or RSB, the XOS-H will also fit our QDX Sling Mount as well as additional future RailScales products to mount at various positions based on use. CNC machined out of high quality US made Black FR4 or our brown terrian colored TerraCore (commonly known as G10), our scales provide an umnatched barrier against heat transfer. 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-H scales to our lineup.

The XOS-H cutout slot is compatible with these RailScales products.

The XOS-H cutout slot is compatible with SureFire Scout Light Pro lights (w/ M-LOK mount) with end-user modification. Send an email to fitment@railscales.us for modification instructions. 

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 - 0.53oz, 4-Slot - 0.70oz (w/ hardware)
  • Material: FR4
  • Color: Black FR4®, TerraCore®
  • Hardware: US Made 416 Stainless M-LOKNuts
  • 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
  • KNS Bren 805
  • 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
  • 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®, Karve®, Karve-P®, Anchor®, RSB®, QDX® are registered trademarks of RailScales LLC.

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

Reviews

(82 reviews) Write a Review

82 Reviews Hide Reviews Show Reviews

  • 5
    Slim and lightweight grip option

    Posted by Weston on Jul 2nd 2025

    Great addition to use in conjunction with the Karve. Quality craftsmanship. Slim and lightweight.

  • 5
    G10 XOS-H

    Posted by Zx14dude on Mar 28th 2025

    A very unique offering, I like the feel and aesthetics. They fit perfectly on the Geissele MK16 rail. I've not tested the heat resistant part of them yet, but I'm sure they'll perform well.

  • 5
    Just what I was looking for!

    Posted by Christopher Gordon on Jan 23rd 2025

    This is an excellent product, it fits around my Arisaka Indexer perfectly, looks terrific, and is extremely grippy! I liked it so much that I immediately ordered a second one for another rifle.

  • 5
    Awesome!

    Posted by Brian Arnedo on Jan 7th 2025

    These scales are awesome! Not only do they look great, they do an excellent job with heat displacement and keeping your grip secure. I’ve always ran competitive brands when it comes to rail covers, but I’m converting all of my rifles over to RailScales. By far the best!

  • 5
    Fantastic

    Posted by Joshua on Oct 5th 2024

    Great feel, fit and finish. Great packaging and easy installation with clear instructions. Will likely use on future builds.

  • 5
    Good quality

    Posted by Ryan on Aug 25th 2024

    Product packaging was nice, things were packaged with care, felt nice unboxing. The rail itself is nice, very light but feels durable. It’s very attractive visually, also the texture is nice, ordered honeycomb. Aside from the design, the material itself is very tacky, similar to a light sandpaper, it didn’t bother bare skin and I haven’t used it with gloves but I can imagine they would pair well for a secure grip. I would say the price is slightly high however once receiving the product and seeing the quality I was fine.

  • 5
    Great Products

    Posted by Ken Taylor on Apr 7th 2024

    Can't say enough about any of Railscale's products, top notch items.

  • 5
    G10 XOS-H

    Posted by John B. on Mar 30th 2024

    bought these along with the Karve-P, and QTR stop. fits great on my 11.5 Sig mcx spear LT. went with the 4 slot option and give a great had placement on the rail. would recommend

  • 5
    Scale

    Posted by Chris on Jan 7th 2024

    Really nice to have this on two of my rifles. As expected works great on my sig spear. I also have one on my PSA jakl. The only issue I have with the on my jakl is the scale would not contour to the bottom of the hand guard. I also had to buy longer screws because the outside edge would prevent the m-lock from engaging on the hand guard. No big deal I bought longer screws and was good to go. The only issue is to have it mount to the bottom of the handguard on the jakl is the scale cracked from trying to get it to sit flush with the rail. Hasn't been a issue while running the rifle so I don't really care about the cracking. Not rails scales fault at all. The functionality is what I want.