A system for displaying an aiming vector of a firearm to a user, the system comprising: at least one illuminating source (110 or 210A), adapted to be positioned along a longitudinal axis of a barrel of the firearm; either wherein the at least one illuminating source is an elongated illuminating source, adapted to be positioned along a longitudinal axis of a barrel of the firearm; or further comprising a second illuminating source adapted to be positioned along a longitudinal axis of a barrel of the firearm, at a predetermined distance from the at least one illuminating source; the system further comprising: at least one light sensor, adapted to be mounted onto a headgear at a predetermined position, configured to detect light parameters from the at least one illuminating source (110, 210A); a display unit designed to be mounted onto the headgear; and characterized by having a processor, configured to: (i) receive the detected light parameters of the at least one elongated illuminating source or the at least one illuminating source and the second illuminating source; (ii) determine a location of the at least one elongated illuminating source or the at least one illuminating source and the second illuminating source, based on the detected light parameters; and (iii) generate an aiming vector of the firearm based on the location of the at least one elongated illuminating source or the at least one illuminating source and the second illuminating source with respect to the predetermined position of the at least one light sensor; wherein the display unit is configured to display the aiming vector generated by the processor. at least one illuminating source (110 or 210A), adapted to be positioned along a longitudinal axis of a barrel of the firearm; either wherein the at least one illuminating source is an elongated illuminating source, adapted to be positioned along a longitudinal axis of a barrel of the firearm; or further comprising a second illuminating source adapted to be positioned along a longitudinal axis of a barrel of the firearm, at a predetermined distance from the at least one illuminating source; the system further comprising: at least one light sensor, adapted to be mounted onto a headgear at a predetermined position, configured to detect light parameters from the at least one illuminating source (110, 210A); a display unit designed to be mounted onto the headgear; and at least one light sensor, adapted to be mounted onto a headgear at a predetermined position, configured to detect light parameters from the at least one illuminating source (110, 210A); a display unit designed to be mounted onto the headgear; and characterized by having a processor, configured to: (i) receive the detected light parameters of the at least one elongated illuminating source or the at least one illuminating source and the second illuminating source; (ii) determine a location of the at least one elongated illuminating source or the at least one illuminating source and the second illuminating source, based on the detected light parameters; and (iii) generate an aiming vector of the firearm based on the location of the at least one elongated illuminating source or the at least one illuminating source and the second illuminating source with respect to the predetermined position of the at least one light sensor; wherein the display unit is configured to display the aiming vector generated by the processor. (i) receive the detected light parameters of the at least one elongated illuminating source or the at least one illuminating source and the second illuminating source; (ii) determine a location of the at least one elongated illuminating source or the at least one illuminating source and the second illuminating source, based on the detected light parameters; and (iii) generate an aiming vector of the firearm based on the location of the at least one elongated illuminating source or the at least one illuminating source and the second illuminating source with respect to the predetermined position of the at least one light sensor;