AmeriGlo brings a clear advantage to your shooting experience on and off the range. Easily visible under all lighting conditions, the AmeriGlo Classic Tritium series sight comes with a green tritium lamp/white outline for the front sight and two green tritium lamps/white outlines for the rear sight. The original standard in self luminous night sights, the Classic 3-dot design is the most popular among personal defense, military, and law enforcement. Fits Glock MOS slide.