Firing Pin - Pistol, Beretta, Model 1934 (M1934) Italian Serial number 591773. [With magazine and holster 2009 Nov 25] The Beretta Model 1934 is a compact, semi-automatic pistol which was issued as a standard service firearm to the Italian armed forces beginning in 1934. It is chambered for the 9 mm Corto, more commonly known as the .380 ACP. The weapon saw extensive use in World War II in the hands of Italian, German, and Romanian forces, and quite a few were captured by Allied forces during the war. From 1934 to 1991, about 1,080,000 pistols were made.