TruGlo Brite-Site TFX Pro Glock 42/43 U-Notch Sight Set - Green w/Orange 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;