Night Fision Optic Mounted Stealth Series Square-Notch Tritium Pistol Night Sight SIG Sauer M18/M17 Yellow Front Green Tritium Rear Black. No problem. Our newest variation of our popular Optics Ready Stealth Sights has a rear sight that mounts to the deck of the optic. No special tools just a hex wrench and the new supplied screws gets you our most popular lower 1/3 cowitness installed on guns that have no rear dovetail. Still carrying our high LPI serrations our patented injection molded sleeve design not only holds our tritium vials securely in place it creates a brighter and more durable ring we call The Perfect Dot that provides maximum visibility both day and night. Specifications for Night Fision Optic Mounted Stealth Series Square-Notch Tritium Pistol Night Sight: Manufacturer: Night Fision Gun Make: SIG Sauer Gun Model: SIG Sauer M17 SIG Sauer M18 Color: Black Front Sight Color: Yellow Rear Sight Color: Black Sight Style: Square-Notch Fabric/Material: CNC Machined Steel Front Material: Steel Gun Type: Pistol Blade Height: 0.253 in Front Blade Height: 0.253 in Rear Blade Height: 0.12 in Height: 0.316 in Illumination Type: Tritium Package Contents: Night Fision Optic Mounted Stealth Series Square-Notch Tritium Pistol Night Sight Night Fision SIG-OMS-M1718-SCS-YGZG: Optic Mounted Stealth Series Square-Notch Tritium Pistol Night Sight SIG Sauer M18/M17 Yellow Front Green Tritium Rear Black