A gun magazine, such as for an automatic pistol, includes an elongate tube for holding cartridges in stacked relationship including a clip for hanging the magazine in inverted position on a support, such as the lip of a pocket or a belt. The clip may be an integral element of the magazine butt plate or may be an add-on attached to the magazine tube or butt plate. The clip includes an outwardly projecting hanger portion projecting outward and a retention portion a free end disposed upward hanger portion and forming a channel between it and the tube, the channel having a mouth for receiving the support. The support may include a bump guard for preventing objects from accidentally upwardly bumping the clip and dislodging it from the support.