QTR™ Stop

Now shipping with our new custom Torx T20 fastener!

QTR™ Stop - Our new QTR Stop is a wide hand stop for M-LOK forends, specifically for Sig Sauer MCX Virtus & Rattler U-rail systems. Designed as a lightweight solution to prevent shooters from slipping a hand in front of the muzzle, and filling the side gaps up to the rail to prevent heat exposure from muzzle blasts. Specifically designed for the 5.56 Rattler U-rail for a Foreign defense contract, the QTR Wide Stop works as intended on any Sig MCX Virtus / Rattler U-rails as well as many other M-LOK forend rails (see compatibility list below). Its upward ears were designed to flow and mate specifically with the Sig U-rail profile to create a wide and seamless barrier. Made out of 7075 Aluminum and hard anodized in Carbon Black or Terra Bronze, and weighing in at just under half an ounce. The QTR Wide Stop takes up only 1/2 M-LOK slot at the end of the rail by utilizing a mini M-LOK recoil lug that hangs over the front lip of the rail. The QTR Wide Stop creates a perfect indexing point to bring the rifle on target securely and consistently. Mounts to 0.925" wide M-LOK flat or narrower.

Ships Free and Made in USA

• Mount Type: M-LOK
• Footprint: 1/2-Slot
• Height: 0.850" off rail, 0.150" upwards on the wings towards the rail
• Length: 1.050"
• Width: 1.450"
• Weight: 0.56oz w/ hardware
• Material: 7075-T6 Aluminum
• Finish: Type 03 Hardcoat Anodizing
• Color: Carbon Black^®, Terra Bronze^® (see anodizing disclaimer on our FAQ page, line 14 here)
• Hardware: US Made 416 Stainless M-LOK Nut
• Fastener: US Made T20 Torx Fastener w/ Nylon Thread Patch

Fitment & Compatibility List:

• Sig Rattler U-Rail - Regular Slot: Yes, Forward Lip: Yes
  
• Sig MCX Virtus U-Rail - Regular Slot: Yes, Forward Lip: Yes
  
• Sig MCX Virtus SD-Rail - Regular Slot: Yes, Forward Lip: Yes
  
• Sig Rattler Canebrake Rail - Regular Slot: Yes, Forward Lip: No
• Sig MCX-SPEAR LT Rail - Regular Slot: Yes, Forward Lip: Yes (May hang off if stacked) - Use QTR-LT Stop for regular LT rails
  
• Sig MCX-SPEAR LT SD Rail - Regular Slot: Yes, Forward Lip: Yes
• Sig M400 Pro - Regular Slot: Yes, Forward Lip: Yes
• Sig MPX/MPX-K MLOK HG: Regular Slot: Yes, Forward Lip: Yes
• B&T APC9-SD/APC45-SD MLOK HG - Regular Slot: Yes, Forward Lip: Yes
• BCM MCMR MLOK HG - Regular Slot: Yes, Forward Lip: Yes
• CZ Scorpion 3 Plus MLOK HG - Regular Slot: Yes, Forward Lip: No
• Daniel Defense RIS 3 HG - Regular Slot: Yes, Forward Lip: No
• Dakota Tactical MHS-SD M-LOK HG - Regular Slot: Yes, Forward Lip: No
• Geissele MK16 HG - Regular Slot: Yes, Forward Lip: Yes - Closer fit with the QTR-LT Stop.
• Heckler & Koch 416/MR556 MLOK HG - Regular Slot: Yes, Forward Lip: No - For the MR556 A4 M-LOK rail, use the QTR-LT Stop. 
• KAC URX4 - Regular Slot: Yes, Forward Lip: Yes
• Lancer Systems MCX Gen 1 Carbon HG - Regular Slot: Yes, Forward Lip: No
  
• Lancer Systems MPX Carbon HG - Regular Slot: Yes, Forward Lip: No
• Midwest Industries MPX MLOK HG - Regular Slot: Yes, Forward Lip: No
• Noveske NSR-SD - Regular Slot: Yes, Forward Lip: No
  
• Noveske NSR - Regular Slot: Yes, Forward Lip: No
  
• Q Honey Badger HG - Regular Slot: Yes, Forward Lip: No (Will not mount on slot where can is under rail)

If you don't see your rail listed or have questions, email fitment@railscales.us

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