TruGlo Brite-Site TFX Pro Glock 42/43 U-Notch Sight Set - Green withOrange Outline - TruGlo created the original TFO day / night sight, then made it virtually indestructible with their hermetically-sealed TFX sights. Now, they are taking TFX 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. Contrasting colored front sight ring for even faster focus Quick and accurate U-notch Design Angled rear sight edge for emergency one-hand operation