Which type of firearm sight is most commonly found on handguns?

Open sights are the most commonly found type of firearm sight on handguns. These sights consist of a front post and a rear notch that allows the shooter to line up the target, making them straightforward and effective for quick aiming. Open sights are favored for their simplicity and durability, as they do not rely on batteries or complex mechanics, which can make them less prone to malfunction.

While red dot sights are increasingly popular for handguns, especially in competitive and tactical applications, they are not as universally standard as open sights. Telescope sights, which provide magnification, are more commonly associated with rifles and are less practical for handguns because they typically require a more stable shooting position and can be bulkier. Laser sights offer a point of aim through a laser beam and are often used as supplementary aiming aids, but they are not the primary sighting system on most handguns. Overall, open sights remain the traditional and most prevalent option for handguns due to their ease of use and reliability.