TruGlo Tritium Glow in the Dark Gun Sight for Smith & Wesson M&P Series PistolsVisibility is key when you're shooting, and having the right hunting & shooting optics can upgrade your whole firearm experience. The TruGlo Glow in the Dark Sight is designed with tritium white and green dot optic sights to provide the brightest three dot aiming points. Enjoy excellent visibility whether you are shooting in broad daylight or low light settings. Naturally, a handgun light is essential for nighttime target acquisition, but tritium