A red dot sight is a type of optical reflex sight that uses a red dot as the aiming point. Red dot sights are popular for use on firearms because they are lightweight, compact, and easy to use. They are also relatively inexpensive, making them a good option for budget-minded shooters.
Red dot sights offer several advantages over traditional iron sights. First, they are much faster to use, as the shooter does not have to align the front and rear sights. Second, they are more accurate, as the red dot is always visible, even in low-light conditions. Third, they are less fatiguing to use, as the shooter does not have to focus on the front sight.