The ATN Ultra Sight Day Time Sight is designed to be a both eyes open, heads-up, rapid acquisition red dot sight. Its revolutionary design lets you choose between four reticle patterns with a simple twist of a knob. An 11-position adjustment for brightness and an accurate windage adjustment make Ultra Sight one of the best red dot sights on the market. The large 33mm display allows for super fast target acquisition and a wide field of view. The open collimating sight design is a tactical advantage in close quarters when things are happening quickly all around you.