QTR-LT™ Stop

QTR-LT™ Stop - A narrower variant of our popular QTR Stop, the QTR-LT Stop was specifically designed for the MCX-Rattler LT rail for a foreign defense contract. 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. The QTR-LT Stop works as intended on any Sig MCX-SPEAR LT/Rattler LT 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 LT-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-LT 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-LT Stop creates a perfect indexing point to bring the rifle on target securely and consistently. Mounts to 0.625" wide M-LOK flat or narrower.

Ships Free and Made in USA

• Mount Type: M-LOK
• Footprint: 1/2-Slot
• Height: 0.850"(from rail) 1.108" (overall)
• 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:

• BCM MCMR M-LOK Rail - Regular Slot: Yes, Forward Slot: Yes
• Dakota Tactical MHS-5/5K M-LOK Rails - Regular Slot: Yes, Forward Slot: Yes
• Daniel Defense MFR M-LOK (Not XL) - Regular Slot: Yes, Foward Slot: Yes (Varies between rail lengths)
• Geissele MK16 Rail - Regular Slot: Yes, Forward Lip: Yes
• Heckler & Koch MR556 A4 M-LOK - Regular Slot: Yes, Forward Slot: No
• Noveske NSR Gen 4 M-LOK Rail - Regular Slot: Yes, Forward Lip: Yes
• Sig Sauer MCX-Rattler LT Rail - Regular Slot: Yes, Forward Lip: Yes (May hang off if stacked)
• Sig Sauer MCX-SPEAR LT Rail - Regular Slot: Yes, Forward Lip: Yes (May hang off if stacked)
• Sig Sauer MCX-SURG Low-Profile Rail - Regular Slot: Yes, Forward Lip: Yes (May hang off if stacked)
• Sig Sauer MCX Virtus SD Rail - Regular Slot: Yes, Forward Lip: Yes
• Q Honey Badger Rail - Regular Slot: Yes, Forward Lip: No

Does Not Fit: 

• CZ Scorpion 3 Plus Factory MLOK Rail 
• Daniel Defense RIS 3 Rail
• Dakota Tactical MHS-SD M-LOK Rail - Use regular QTR Stop for the MHS-SD
• KAC URX4 M-LOK Rail
• LMT MRP M-LOK Upper/Rail
• Noveske NSR Gen 3 M-LOK
• Sig Sauer M400/M400 SDI X M-LOK Rail
• Sig Sauer MCX Rattler U-Rail (Gen 1 5.5")
• Sig Sauer MCX-SPEAR (7.62x51/308/6.5/6.8)
• Sig Sauer MCX-SPEAR LT SD Rail - Use regular QTR Stop for LT SD rail
• Sig Sauer MCX-SURG SD Rail (Wide Rail)
• Sig Sauer MCX Virtus U-Rail Rail
• Sig Sauer MPX/MPX-K M-LOK Rail

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

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