Truglo Brite-Site TFX Pro Tritium/Fiber-Optic Sight Fits S&W M&P SHIELD Day/Night Sight 24/7 Brightness Orange Front Sight TG-TG13MP1PC

They created the original TFO(R) day / night sight” then made it virtually indestructible with their hermetically-sealed TFX(TM) sights. Now” they are taking TFX(TM) technology to the next level for professionals and shooters who demand maximum performance from their handguns-providing ultimate reliability” accuracy” and brightness no matter how tough things get.