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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
    Whoops they did it again..

    Posted by Tyebo on Apr 5th 2021

    Railscales has done it again, these guys hit it out out the park with every product they offer. These hand guard grips feel good, perform great and look even better! Was a little unsure how grippy this pattern would be but they’re great whether you’re wearing gloves or not. Don’t wait, they sell out of current stock fast!

  • 5
    G10 XOS M-Lok

    Posted by John Zucconi on Mar 31st 2021

    Great handguard covers, durable, heat resistant and solid. A+

  • 5
    G10 XOS

    Posted by Andrew on Mar 29th 2021

    This is the product is was most excited to try out. It provides a strong grip while not being to abrasive on the hand. I especially enjoy how they wrap around the rail for better ergonomics. Highly recommended!

  • 5
    XOS

    Posted by Jamal on Mar 24th 2021

    Just picked up the 3 slot of these as a set. I love em! Very slim, very grippy however not overly abrasive in your hand, and esthetically pleasing. Went with the "Honey Comb" version.

  • 5
    3 SLOT XOS MATRIX

    Posted by Steven Dombrosky on Mar 20th 2021

    I finally upgraded my slate black ind. grips to the XOS MATRIX and wow what a difference. The plastic SBI's were slippy. These grips are aggressive and fantastic. No slipping at all, even on my 308 AR. Would recommend if you want the best grips on the market and to pull that rifle into your shoulder to help with recoil control.

  • 5
    G10 XOS Dragonscale

    Posted by Shawn M on Mar 13th 2021

    I couldn’t of been more thrilled with the look and feel of the dragon scale. I seriously can’t put my rifle down now, it feels that good. And they look down right amazing. Don’t hesitate on getting these, you will NOT regret it I promise. 11/10 they knocked it out of the park

  • 5
    Quality

    Posted by Chris b on Feb 26th 2021

    RailScales are the highest quality rail covers bar none you can feel the quality of material used when you hold it they help grip and are aesthetically pleasing they’re worth every penny and I’m happy to be spending money with a local company just a few hours away in Claremore OK. Keep up the great work guys can’t wait to place another order!

  • 5
    G10 xos in mlok matrix

    Posted by Jason s on Feb 23rd 2021

    Amazing absolutely love the quality and fit . My only complaint is that the don’t make the xos in a smaller mlok pattern like 2 or 2.5 slot I think it would offer more options on pistol builds

  • 5
    G10 XOS-H , G10 XOS

    Posted by Thomas Olson on Feb 1st 2021

    Excellent grip, with or without gloves, rain or shine. Excellent product from excellent company. I was recently informed the XOS-H will accommodate both the Karve and the Anchor if you want to switch the two out depending on application.