The XS Sights R3D Night Sights Green for Glock Suppressor/RMR Height 42 43 43x and 48 deliver a traditional 3-dot tritium notch and post sight picture with a front tritium sight featuring our proprietary Glow Dot that absorbs ambient light and glows in low light, while the rear 2-dot tritium is blacked-out to keep attention on the front for precise indexing. This design prioritizes front sight focus by using a brighter tritium vial upfront and allowing the Glow Dot to glow slightly from the charging light, creating a brighter front sight that remains visible downrange without overwhelming the rear. Built from durable CNC machined steel, the R3D offers a high-contrast matte finish, an anti-reflective rear tritium lens, and a rear sight overhang that reduces glare, all contributing to quick, reliable target acquisition in a variety of lighting conditions. The package includes a choice of tritium or non-tritium rear, a rear ledge for one-handed slide manipulations, and compatibility with suppressor-height sets on factory MOS pistols, including common optics like the RMR, SRO, Holosun 507c, and Vortex Viper systems, making it an ideal upgrade for Glock users seeking consistent accuracy and fast, reliable sighting in both bright and low light.