A modular launch-cell system for a launch vehicle. The method includes a number of launch-cells, a base and an upper attachment arrangement. The launch-cells include a missile and are arranged in a structure which includes a number of layers, each of the layer includes two or more launch cells. The launch-cells are substantially directly reversibly mechanically connected to the base. One of the launch-cells includes a lower attachment arrangement configured for reversibly mechanically connecting one launch-cell to one or more of the base and another of the launch-cells disposed below the one launch-cell. The upper arrangement is designed for reversibly mechanically connecting one launch-cell to another of the launch-cells disposed above the one launch-cell.