"The 1938 series was extremely robust and proved very popular with Axis forces as well as Allied troops, who used captured examples. Many German soldiers, including elite forces such as the Waffen-SS and Fallschirmjäger forces, preferred the Beretta 38. Firing a powerfully loaded Italian version of the widely distributed 9×19mm Parabellum cartridge, the Cartuccia 9 mm M38, the Beretta was accurate at longer ranges than most other submachine guns. The MAB could deliver an impressive firepower at close range and at longer distances its size and weight was an advantage, making the weapon stable and easy to control. In expert hands, the Beretta MAB allowed accurate short-bursts shooting up to 100 m (110 yd) and its effective range with Italian M38 ammunition, was 200 m (220 yd)s, an impressive result for a 9 mm submachine gun.
A high quality gun, and very reliable. Despite the tubular appearance, it used a milled receiver and was fairly expensive to manufacture – one of the last of the first generation SMG designs. All variants had dual triggers; the front one for semiauto fire and the rear for full auto."