Meprolight 477863131: Mepro Hyper-Bright fixed pistol sight features an extremely bright contrasting colored ring front sight. Shooters can select from one of three colors Green, Yellow or Orange for the front sight. The tritium is illuminated green to provide low-light and nighttime aiming capabilities. The contrast in colors of the two components helps the shooter focus on the front sight quicker, which is critical in defensive and competitive shooting.