This disclosure relates generally to an apparatus for loading and unloading of unit loads in freight. A mobile base platform of the apparatus includes a telescopic railing and a telescopic conveyor, wherein the telescopic conveyor is mounted on top of the telescopic railing and the tail end of the telescopic railing is mounted on the front end of mobile base platform. A mechanical connector is adapted to connect the front end of a telescopic conveyor with the front end of the telescopic railing, wherein the mechanical connector enables the telescopic robotic mounting plate coupled to the telescopic railing to move in relation to the telescopic conveyor. The telescopic conveyor and the telescopic railing is moved towards the forward position inside the carrying body, where the forward position movement is enabled by the mechanical link to unload freight.