XS Sight Systems R3D Tritium Pistol Night Sights. R3D 2.0 sights are the premium solution for a traditional notch and post sighting system. The set is engineered to provide a brighter stronger and easily installable sighting system for increased defensive preparedness. Features of XS Sight Systems R3D Tritium Pistol Night Sights: Tritium front and rear with high contrast glow dot Photoluminescent glow dot absorbs ambient light and glows in low light Wide notch rear with anti-reflective lens Package Contents: XS Sight Systems R3D Tritium Pistol Night Sights