The Meprolight C.O.R.E Night Sight Set is designed to fit the Smith & Wesson M&P 9L Pro Series C.O.R.E. These sights are constructed with green tritium front and rear sights which provide excellent vision for daytime, night time, and low light conditions with no batteries required. Designed for the Smith & Wesson M&P 9L Pro Series C.O.R.E. Green tritium front and rear sights Improved target acquisition in low light Performs in all lighting conditions No batteries needed