Iron sights
Videos
Iron sights are a system of physical alignment markers used as a sighting device to assist the accurate aiming of ranged weapons such as firearms, airguns, crossbows, and bows, or less commonly as a p
Sight picture through iron sights of an H&K MP5 submachine gun. The annular shroud around the front post sight is aligned with the rear peep sight to ensure the firearm is properly trained.
Aerial gunnery iron ring sight on a GAU-21 that allows for compensating for the roll-pitch-yaw of an aircraft.
Spiderweb-type (low level) anti-aircraft sight on an MG 34.
Guttersnipe sight on the ASP pistol
Diopter sight
Videos
A diopter sight is an aperture sight component used to assist the aiming of ranged weapons, mainly firearms, airguns, and crossbows. Diopters function to precisely align the shooter's eye with the fro
Target shooting diopter of a 10 metre air rifle with a mounted semi-transparent occluder for the non-aiming eye
Rear, rotating diopter drum sight of a SIG SG 550 service rifle. The viewing aperture above the "3" (denoting the 300 m setting) can be seen.
Civilian AR-15 target sights have an aperture between 1 and 1.15 mm (0.039 and 0.045 in). The aperture on AR-15 military sights have a day aperture of approximately 1.78 mm (0.070 in), and the M16A2 also a night setting with a larger 5.08 mm (0.200 in), and as such the military sight is not strictly a diopter sight in either setting.
The concentric circle alignment principle is used for precise aiming at round targets