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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
    Matrix mos

    Posted by Matt on Oct 3rd 2020

    Love all these ! I keep buying them for all my mlok guns

  • 5
    Xos in m lok

    Posted by Mike on Jul 28th 2020

    This product is awesome!It compliments my daniel defense dd7m4 p.Looks bad ass on it.

  • 5
    Great product

    Posted by Matthew Baker on Jul 23rd 2020

    Ordered the honeycomb pattern rail guards not only did they arrive faster than they said it would they are a perfect fit very durable and lightweight and will fit ur AR like a glove, 5 stars for the product and the company keepin up the good work durin this pandemic keep up the good work guys love the product

  • 5
    HOS minidot 3 slot

    Posted by Michael Gjonaj on Jul 19th 2020

    Fits my hand guard absolutely perfectly (FN DMRII) amazing grip texture and aesthetically pleasing! Well worth the money thanks guys!

  • 5
    XOS Scales

    Posted by J Gilliland on Jul 14th 2020

    Great craftsmanship looks tough and feels great! Easily installed, great upgrade for my Ruger AR Pistol!

  • 5
    Great product

    Posted by Zach on Jul 1st 2020

    I ordered the XOS Matrix 4 slot. It arrived extremely quickly and was very easy to install. I had a pic rail on the forend of my M1A and it was obtrusive and uncomfortable. I came across these the other day and knew they would work great. The rifle sits in my support hand much more naturally with the XOS in place of the rail. The texture is adequate, but not abrasive to your hand. The mounting process I used was not average since my chassis system is set up for Picatinny. I had to make a trip to the hardware store to grab some 8-32 thread T-Nuts that matched the supplied m-lok machine screws. I loaded my rifle up on the drill press and punched the Picatinny mount holes out so that the T-nuts fit snugly into the stock. At that point I simply used the supplied screws and mounted the piece snugly to the stock. I will watch the setup as I shoot the rifle. I might need to epoxy the T-nuts to the stock if it loosens any at all. I’m not overly worried though. I will definitely recommend these to my friends. I like the sleek look they give my rifle. The days of huge quad rails with garbage everywhere are long gone. I’m glad I found a way to cover unused rail space. Thanks for reading, I hope this helps someone.

  • 5
    Matrix grips

    Posted by Brent Bledsoe on Jun 25th 2020

    I really like the grips a lot, I feel like they are kind of pricey for the amount of material that you receive but overall very pleased w this product.

  • 5
    Scales

    Posted by Sir Erik The Wise on Jun 17th 2020

    Use these on my BCM. They keep my hand safe while the rifle builds up heat. Provide very good grip too. Pretty much everything you need while adding a badass look.

  • 5
    XOS

    Posted by Chris on Jun 13th 2020

    Awesome product! Fit and finish is excellent, fits my DDM4v7 handgaurd perfectly. I'm a product developer by trade and highly recommend this product to anyone looking for a quality rail solution.