TRUGLO TRITIUM HANDGUN SIGHT: When the lights go out, your sidearm doesn't need to be left in the dark. The Tritium night sight transitions from standard white dot sight during the daylight, to a glowing green dot in the dark. Tritium does not need batteries and does not need to be charged with light - it simply glows! This TruGlo High-Visible Night Sight is compatible with Ruger Models. MAIN FEATURES: - Night Sight compatible with Ruger Handguns; - Excellent visibility in low-light or complete darkness; - Daylight white dot and night Tritium dot; - Glows in the dark - no batteries, light exposure required; - FORTRESS FINISH nitride protective coating; - Smooth, snag-resistant design; - Durable CNC Steel; ABOUT TRUGLO: TRUGLO is the leading manufacturer of fiber-optic sights, tritium handgun sights, and shooting accessories for bows, crossbows, and handguns. We're a Texas company. Inherently, that means we like our guns, and slinging lead a long way. From target archery and crossbow hunting to carry pistols and tactical competition, TruGlo has accessories to improve your gear. Regardless of your outdoor sporting interest, we have gear that's optimized for your style and budget.