Collimator sight
Videos
A collimator sight is a type of optical sight that allows the user looking into it to see an illuminated aiming point aligned with the device the sight is attached to, regardless of eye position. They
M4 collimator sight on a M4 mortar
Red dot sight
Videos
A red dot sight is a common classification for a non-magnifying reflector sight that provides an illuminated red dot to the user as a point of aim. A standard design uses a red light-emitting diode at
Collimator sight
…Glossary of military abbreviations Red dot sight Reflector sight…
View through Tasco ProPoint red dot sight (model PDP2ST) on a Ruger 10/22. Made in Japan for Tasco, the ProPoint 2 was one of the first red dot sight models to become widely popular.
Reflex sights have varying dot viewing angles; that is the maximum angle the operator's eye can be offset from the center-axis of the sight whilst the dot still remains visible.
Left: Aimpoint Acro C2 reflex sight lying on its side. Right: Acro rail on a Picatinny rail riser.
A U.S. Marine looking through an ITL MARS combination red dot and laser sight mounted on his M16A4 MWS rifle during the Second Battle of Fallujah, 2004