An optic sight assembly (100, 200) for installation on a rifle comprising: an electro-optical optic sight unit (102, 210) comprising: a controller unit; a remote control receiver; and an electro-optical unit to project a reticle image; and a corresponding remote control unit (104, 260) to control one or more operational parameters of the electro-optical optic sight unit (102, 210) comprising: a remote control controller; a remote control transmitter to transmit control signals to the remote control receiver, wherein the remote control transmitter is adapted to transmit the control signals via a narrow beam aimed towards the electro-optical optic sight unit when the remote control unit is installed on a front portion of a rifle, wherein the angle of radiation of the beam is 10°; and a keypad unit to enable entering control commands to the remote control unit comprising control buttons which may be configured to have different functions and control different operational parameters of said electro-optical optic sight unit; wherein the electro-optical optic sight unit is adapted to receive control signals from the remote control unit to control one or more of said operational parameters of the electro-optical optic sight unit. an electro-optical optic sight unit (102, 210) comprising: a controller unit; a remote control receiver; and an electro-optical unit to project a reticle image; and a controller unit; a remote control receiver; and an electro-optical unit to project a reticle image; and a corresponding remote control unit (104, 260) to control one or more operational parameters of the electro-optical optic sight unit (102, 210) comprising: a remote control controller; a remote control transmitter to transmit control signals to the remote control receiver, wherein the remote control transmitter is adapted to transmit the control signals via a narrow beam aimed towards the electro-optical optic sight unit when the remote control unit is installed on a front portion of a rifle, wherein the angle of radiation of the beam is 10°; and a keypad unit to enable entering control commands to the remote control unit comprising control buttons which may be configured to have different functions and control different operational parameters of said electro-optical optic sight unit; wherein the electro-optical optic sight unit is adapted to receive control signals from the remote control unit to control one or more of said operational parameters of the electro-optical optic sight unit. a remote control controller; a remote control transmitter to transmit control signals to the remote control receiver, wherein the remote control transmitter is adapted to transmit the control signals via a narrow beam aimed towards the electro-optical optic sight unit when the remote control unit is installed on a front portion of a rifle, wherein the angle of radiation of the beam is 10°; and a keypad unit to enable entering control commands to the remote control unit comprising control buttons which may be configured to have different functions and control different operational parameters of said electro-optical optic sight unit; wherein the electro-optical optic sight unit is adapted to receive control signals from the remote control unit to control one or more of said operational parameters of the electro-optical optic sight unit.