Visibility 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 night sights can counter the whitewash from the tac-light so you can still aim accurately. This TG231G1MW model was designed to be compatible with Smith & Wesson M&P pistols including SHIELD models and excluding .22 Compact / CORE models. It is also compatible with SD9 and SD40 models, excluding VE models. Check the images for a full list of compatibilities. This pistol sight transitions from standard white dot sights during the daylight, to glowing green dots in the dark for added visibility. Fit this sight in your standard holster easily with the no-snag design. Experience true accuracy with top-notch gun sights and if you are looking for a glow-in-the-dark sight set, add the TruGlo Glow-in-the-Dark Sight that is sure to improve your visibility during the day or at night whether you are hunting or doing your routine nighttime training.