An optic sight assembly for installation on a riffle is disclosed, comprising an electro-optical optic sight unit which comprises a controller unit, a remote control receiver, and an electro-optical unit to project a reticle image; and a corresponding remote control unit to control operational parameters of the electro-optical optic sight. The remote control unit comprises a remote control controller to produce control signals for transmitting to the remote control receiver, and a keypad unit to enable entering control commands to the remote control unit, wherein the electro-optical optic sight is adapted to receive control signals from the remote control unit to control operational parameters of the reticle.