Created to address the needs of tactical shooters, the Bright & Tough Night Sight for Glock Standard Frame from Trijicon features green tritium lamps with protective and light-shaping sapphire jewels. The lamps do not require batteries to provide illumination for the sight in low-light conditions. The lamps are encapsulated by aluminum cylinders that protect them from abrasions and shock. The metal housing features silicone cushions to offer recoil-resistant performance.