TruGlo TGTG231N3 Tritium Black | Green Tritium Front Sight Green Tritium Rear SightWhen the lights go out, your sidearm doesn't need to be left in the dark. TRITIUM night sights transition from standard white dot sights during the daylight, to glowing green dots in the dark. Tritium does not need batteries and does not need to be charged with light it simply glows! Assembled in USA with quality Swiss tritium for maximum brightness. Fits standard holsters. This model fits 1911 3" Officer & 4. 25" Commander . 45 ACP. *Reference to