TRUGLO Tritium Pro Brite Site Day / Night Sight Set For Glock Low M.O.S., Front Sight Color Green W/ Orange Focus Lock Ring, Rear Sight Green, Glows In The Dark No Batteries Or Light Exposure Required TG-TG231G1MW The Tritium Pro series of night sights features a 3-dot configuration with front and rear tritium illumination. The front sight features a white front focus lock ring which aids in front sight acquisition during normal daylight hours. The rear sight features a hooked style profile while the rear sight notch features the classic U shape. The housing is made of high quality steel with a matte black finish. If you are concerned about your ability to make quality hits on target during a potential night time encounter then pick up yourself a set of the new Tritium Pro's from TruGlo.