M121 or M-121 may refer to: * M121/A1 155mm Cartridge, a U.S. Army chemical artillery shell * M-121 (bomb), a World War II bomb * M121 mortar carrier, the United States designation for the Soltam TT6 * M-121 highway (Michigan), a road connecting Zeeland and Grandville * Mauboussin M.121 Corsaire Major, a 1921 French trainer and touring aircraft This disambiguation page lists articles associated with the same title formed as a letter-number combination. If an internal link led you here, you may wish to change the link to point directly to the intended article.