A universal diopter target sight designed for the EDGE 10 meter 3-Position Sporter Class Target Rifle. The sight is adaptable to most airguns with its standard 11mm dovetail-mounting base. Sighting adjustment is performed with large 1/8 minute click adjustment knobs that may be reset to zero. Sight can be removed from mounting base and clamped into any 1" scope ring. The sight aperture uses the standard European metric thread so adjustable apertures may also be used.