This Trijicon HD Night Sight Set was designed to fit the Heckler & Koch USP Compact, and it is covered by a 12-year warranty. This night sight set includes two three-dot green tritium high-definition sights that were created specifically to fulfill the requirements of hunters and tactical shooters. The front sight in this HD night sight set has a yellow outline, and it has a tall blade and a photoluminescent aiming point for increased visibility. The rear sight has a U-shaped wide notch and a black outline