An ammunition box with a rectangular molded thermoplastic material box body defining a rectangular storage space for ammunition. The box body opens to one side that can be closed with a flat rectangular molded thermoplastic material lid. The box body is provided with integrally molded hollow collapsible projections at its corners for preventing damage from impact to the ammunition box. The lid can be provided with corresponding integrally molded hollow collapsible projections that preferably form an extension of the integrated molded hollow collapsible projections of the box body when the lid is in the closed position.