Sights with 2 dots and circle reticle

Circle with 2 dots

— a kind of circle with a point (see the relevant paragraph), which has a second, additional point — usually below the first, at a strictly defined angular distance from it. This expands the possibilities for using the sight as an impromptu rangefinder, and also allows you to "on the move" take an amendment when shooting at long distances — just aim at the second, lower point. However, such features for collimators are extremely rarely required, so this option has not received much distribution either.