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. It is machined of steel and utilizes Swiss-made tritium light sources.This model has green tritium with white outline and a black frame. It is compatible with Springfield XD,XD-M,XD-S. (Excluding OSP)