An Italian submachine gun developed in the 1950s at the Fabbrica d’Armi Pietro Beretta S.p.A. in Milan. In 1959, the Beretta M12 submachine gun was introduced to the armament of the Italian army. Later, it was also exported to a number of other countries. Operates on the principle of recoil free lock, sliding on the barrel. The lock chamber with front and rear grip, magazine slot and drain chamber form one unit. Needle strike mechanism with a fixed needle.