The Ameriglo SW245 i-Dot sight set is a premium sighting system featuring a green tritium lamp with an orange outline at the front. Utilizing a single tritium lamp on the rear, ideally positioned below the subtly rounded sight notch, makes this product stand out. The i-Dot design ensures easy front sighting while maintaining back illumination capabilities. This variant of the i-Dot sight set is specifically designed for Smith & Wesson Shield firearms. Please note, however, that it is not compatible with S&W revolvers, C.o.r.e., or .22 Models.