The FT (Fiber-Tritium} optic pistol sight is a revolutionary design that eliminates the need for the front sight. Meprolight's top engineers combined fiber optics and tritium technology to produce a handgun sight that works day or night and in all lighting conditions. No batteries needed. Center the dot in the circle and you are on target. Simple fast and accurate. The innovative single rear sight is low profile and will not snag on clothing and fits all holsters. Single rear sight no front sight needed Includes simple installation tool Fits in standard pistol holsters No batteries or maintenance required Brightest micro optic sight in the industry Meprolight 12-year Luminance guarantee (original owner) Available in red or green dot