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G10 XOS-H® in MLOK

(81 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

(81 reviews) Write a Review

81 Reviews Hide Reviews Show Reviews

  • 5
    Well worth it!

    Posted by Evan on Sep 21st 2019

    Seamless integration with the Karve I ordered as well. Just what my rifle needed for a extremely lightweight durable gripping surface.

  • 5
    Cool modular idea

    Posted by Ryan J. on Sep 19th 2019

    I really like how they designed this around their other products, would just like to see a few more options to fit in them!

  • 5
    Modular made cool

    Posted by Terry on Sep 19th 2019

    Can't say enough about how cool and customizable this is. Really hope they add some more stuff to the Xos H lineup soon!

  • 5
    Awesome product and awesome shipping

    Posted by Alex on Sep 19th 2019

    I debated whether I should invest in a RailScale setup given the costs, but after I received the XOS-H, along with the Karve-P, and two G10 long panels....I couldn't be happier with my purchase. These panels are really innovative, provide excellent grip, and weigh next to nothing. The shipping, and communication with CS was perfect. They really seem to care about your business, and pay attention to the small, yet important details in that regard. Will be doing business with RS in the future whenever it's an option. 5 stars!

  • 5
    Top Notch Product and Service

    Posted by Taylor R. Schreiber on Sep 19th 2019

    I purchased some HTP Scales, XOS-H Type 1, and a Karve-P for a couple builds I had in the works. Product came quick and neatly packaged. I went to put them on the handguard to mock up where I wanted them to be after i got everything cerakoted. Unfortunately due to my own ignorance I over torqued the screws as I didn't want them vibrating off and as a result stripped a few of the heads on the screws. I shot out an email in hopes of getting a few screws sent my way and within 20 minutes I had a response telling me they looked up my order and were going to send me out a full set of replacement screws just in case, and not just the amount I asked for. Can't beat that kind of quick customer service. All free of charge too I might add! All three products are absolutely killer in form and function! I love when companies remember their customers and do everything in their power to help them out. I will for sure be buying more from them in future builds. 5/5 for the product, 10/5 for the customer service.

  • 5
    Add more stuff for the XOS-H!

    Posted by Aaron L. on Sep 19th 2019

    Railscales already had my business with the Anchor and Karve, and when I saw this show up I couldn't believe how brilliant of a design it was. I really hope they have more things coming to fit this footprint, as you can tell how much time they took to make this look and function perfectly with their other products.

  • 5
    Great Product

    Posted by Mike on Sep 19th 2019

    I already had a Karve and regular railscales, but as soon as i saw this i had to get it. Fits perfectly with the karve and makes gripping the end of the handguard more comfortable with a lot of grip. It also looks great on my PWS MK111. Keep up the good work

  • 5
    Completely satisfied

    Posted by Kole on Sep 19th 2019

    There really is no way to explain how perfectly the xos-h fit my palmetto state upper. You have to feel it to really appreciate the perfection in these pieces. I used the Karve-p with this and it really enhances the feel and control of the entire weapon. I will use Rail Scales for all future builds!

  • 5
    Perfect integration

    Posted by Chris on Sep 19th 2019

    When it comes to controls (vertical grips, hand stops) trying to set them up with rail covers of any kind can be a challenge, gaps and overlaps etc. This solves that problem, provided your using a karve or anchor. The fit is perfect and nearly seamless. I will be ordering more for my AK and 308