Enhance your shooting experience using the Trijicon Glock HD XR Night Sight Set. This two-piece kit consists of a narrow front sight and a rear U-notch, featuring battery-free green tritium phosphor lamps that glow in the dark. While the front sight has one tritium lamp encircled by a photoluminescent orange disk, the rear U-notch only bears two tritium lamps, one on each wing. The set's design is aimed at increasing visibility, quickening target acquisitions (even in transitional lighting), and improving distance shooting. For added durability, the sight's lamps are encapsulated into aluminum cylinders and have silicone cushions. For protection against gun-cleaning agents and proper distribution of light, the lamps are also sealed with sapphire windows.