With the challenges of law enforcement and military in mind, Trijicon HD Night Sights is a self-luminous three dot sight set which uses a tritium-phosphor lamp protected within an aluminum sleeve and capped with a sapphire jewel to evenly distribute light and protect from solvents and puncture. They have a metal body with a silicone rubber cushion for shock protection. The u-notched rear sight is angled and serrated to reduce glare, while the front sight has a tall blade. The protective clear coat resists powder residue and cleaning solvents to keep the color bright for years. This sight set will fit Glock models: 17, 17L, 19, 22-28, 31-35, 37-39. It has a orange front outline sight.