The M-12 is a designation that can refer to various military equipment, including vehicles and weapons systems. One notable example is the M-12 gun motor carriage, a self-propelled artillery piece used by the United States during World War II. It was designed to provide mobile artillery support on the battlefield. In addition to military applications, M-12 can also refer to specific models of vehicles or aircraft. For instance, the M-12 is sometimes associated with certain models of Mitsubishi vehicles. Each context of M-12 serves different purposes, highlighting its versatility in military and automotive fields.