The MAB 38 and its variants were the official submachine guns of the Italian Army during World War II. The MAB (Moschetto Automatico Beretta) 1938A was introduced in 1938. Variants remained in production until 1975. The Beretta was also used by the Germany, Romanian, and Argentina armies. The Model 1938A can be recognized by the perforated cooling sleeve over the barrel. It was produced from 1938 to 1950. It had 10, 20, 30 or 40-round magazines and fired at a rate of 600 rounds per minute.