The term 'Machine Gun of Many Action Films' can be summarized as the Uzi, a three-letter word. The Uzi is a family of Israeli open-bolt, blowback-operated submachine guns. It was first developed in the late 1940s by Major Uziel Gal and was used by the Israeli military and special forces in the 1950s. The Uzi has since become one of the most iconic weapons in action films, appearing in countless movies and television shows.