Ammunition supply system and a weapon system

It is described an ammunition supply system (10) for a weapon (1), the system comprising: - a linkless ammunition magazine (11) with single ammunition positions (13, 13', 13"), wherein the linkless ammunition magazine (11) is connectable to an ammunition receiving opening (2) of the weapon (1); - an override actuator (30) connectable to an override interface (3) of the weapon (i); - a motor (12) for moving ammunition (40) inside the linkless ammunition magazine (ii); - a control system (50) for controlling the override actuator (30) and the motor (12); wherein the ammunition supply system (10) is configured to be in the following states: - a weapon firing state, in which the override actuator (30) is turned off thereby allowing the ammunition (40) to move from the linkless ammunition magazine (11) towards the weapon (1); and - an ammunition moving state, in which the override actuator (30) is turned on thereby allowing the motor (12) to move ammunition (40) inside the linkless ammunition magazine (11). It is further described a weapon system comprising the ammunition supply system (10) and a method of operating a weapon system (100).