G10 XOS® in MLOK

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
• Classified Defense MCR Rail
• CMMG KeyMod/MLOK
• Dakota Tactical HK Series KeyMod/MLOK - DOES NOT fit the MHS-SD rail.
• 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:

• B&T APC9/APC45 SD MLOK
• Brownells BRN-180
• Black Rain Ordnance MLOK
• CZ BREN 805
• Daniel Defense RIS III 
• Dakota Tactical MHS-SD
• Geissele MK18 MLOK
• Geissele MRGG Mk1
• 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
• SOLGW MK1
• TriArc TriLok MLOK 

ITAR, EAR, and CCL Notice
Some RailScales products maybe controlled for export by the International Traffic in Arms Regulations (ITAR), Export Administration Regulations (EAR) under the Commerce Control List (CCL). These controls take the form of export regulations and license requirements. As part of the express consideration provided for receipt of RailScales goods, technical data and/or services, you, our customer, acknowledge that the export, re-export or other transfer, directly or indirectly, of the goods, technical data and/or services provided by RailScales in violation of U.S. law is prohibited. Customers acquiring controlled goods, technical data and/or services from RailScales shall be responsible for obtaining any necessary U.S. or other government authorization required to ensure compliance with applicable export laws. For further information regarding the applicable laws, regulations, and policies please consult with your export control administrator or contact: U.S. Department of State www.pmddtc.state.gov/ddtc_public