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G10 XOS-H® in MLOK

(81 reviews) Write a Review
$61.00
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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
    Doesn't Get Any Better

    Posted by BREWINZ on Apr 21st 2020

    Fit and function are unparalleled. Truly a game changing product of the highest quality.

  • 3
    XOS-H

    Posted by Richard Leon Rogers on Apr 21st 2020

    Works great but was expecting a pack of 3 for the price I paid. Unfortunately it only came with one. Feels great though.

  • 5
    Much better than stock, excellent customer service!

    Posted by Devin Konopa on Apr 8th 2020

    I love that these wrap on the sides allowing a total grip. I was not happy with how the standard barrel felt and these were the perfect solution. Having the open bottom for foregrip attachment is a prime design and really is seamless with the rsb or handstop they have. Customer service is also 5/5. Decided I'd rather have the rsb and longer scale after putting it on and was able to return and swap it out. Also was taken the time to have various questions answered and got some advice on shooting styles and grips. A+ do recommend.

  • 5
    Performance and style must have!

    Posted by Thomas Wyatt on Mar 29th 2020

    I was like others, hesitant to splurge on a set of scales, but wow I'm very glad I pulled the trigger. I got 2 XOS & 1 XOS-H, 3 slot, scales (matrix pattern), and a bronze Karve. All products were everything I hoped for and better! High quality, plus a quick & easy install. The XOS scales PERFECTLY contour with the rail/handguard shape of my Sig Sauer Canebrake. Very low profile, and seem as if they are naturally a part of the weapon. The XOS-H scale I used on my 6o'clock rail, along with the Karve. The Karve fitment into the hole was perfect. I was slightly worried that the matrix pattern may be a bit too aggressive, however I wanted maximum grip! Very happy with the texture. It is extremely aggressive, but it isnt uncomfortable to shoot/grip without gloves. I'm very happy with the pattern/texture, as I wanted aggressive grip without discomfort, and these delivered. The Canebrake conceals most of my suppressor inside of the handguard, so it definitely gets warm. These scales made a HUGE difference in terms of heat, grip, control, and aesthetics! Cant say enough good about every product I ordered, if you're on the fence just do it!! I know I will be ordering more, asap! I'll have a Railscales setup on every compatible weapon I own.

  • 5
    Pairs with the Karve P perfectly.

    Posted by Adrian G on Mar 8th 2020

    Finally got around to running the XOS-H paired with a Karve P on my carbine this weekend at class. Here in Michigan during March it’s very cold wet and muddy. Needless to say the scales facilitated control of the gun by a long shot. By the end of the day my gun and I were covered in mud but I was still able to manipulate the weapon due to them. Others in the class were struggling with a slick rain. Hands down one of the best investments I’ve made. And I’ll definitely buy them again for my next build.

  • 5
    Very happy with XOS-H

    Posted by Joseph Maddox on Feb 2nd 2020

    Was very satisfied with XOS-H scales and its texture. It paired seamlessly with the Anchor vert grip. I got it in Matrix pattern scales and was surprised at just how much traction they provide. The contour is perfect for the handguard on my DDM4V7.

  • 5
    MLOK XOS-H

    Posted by Matt L on Jan 20th 2020

    Fits my BCM MLOK rail like a glove. Paired with a Karve, it makes an awesome combination on an AR pistol.

  • 5
    Excellent Quality

    Posted by BREWINZ on Dec 29th 2019

    Fits the Foxtrot Mike Products FM9 perfectly.

  • 5
    Best there is!

    Posted by TPNES on Oct 14th 2019

    I have these on several MLOK hand guards on the 6 o clock position with the original scales at 3 and 9. The XOS-H allows for more grip and fits the rounding of your hand at 6 o clock with its extra siding. Rock solid mounting and G10 strength, there is no better alternative (or better looking), with great grip texture. I use both the Karve and RSB which fit snugly into the slot, tight tolerances, and seamless low profile. Highly recommend either of those, Karve as a hand stop for c-grip and the RSB allows a variety of grip styles including c-grip, as a hand stop, one or two or three fingers on the stubby, etc. Not long enough for a true broom stick grasp though you can still pull it off if you desire. Both are very durable for use as a barrier stop as well.