Abstract: A driving mechanism for controllably opening and closing the cover of an ammunition storage magazine of an armored land vehicle operates to enable the cover to be opened in an essentially vertical position by automatic hydraulic means when the ammunition, which may comprise rockets or the like, is to be loaded into a launcher located above the magazine. When it is desired to reload the magazine itself, the cover may be detached from the driving mechanism and manually opened into a horizontal position extending generally flush with the opening of the magazine itself to facilitate loading of ammunition into the magazine.