A Farewell to Arms
A Farewell to Arms is a 1957 screen adaptation of famous novel by Ernest Hemingway, directed by Charles Vidor and starring Rock Hudson and Jennifer Jones.
The following weapons were used in the film A Farewell to Arms:
Italian officers are seen with pistol holsters but they mostly look flat and empty. Only once a grip of a pistol can be seen. The pistol has a magazine spur which in combination with the shape and side of the holsters allows to guess that the pistol is anachronistic Beretta M1934.
Italian infantry carry Carcano M91 rifles.
Carcano M91 TS
Italian military police and some other soldiers are seen with Carcano M91 TS carbines.
Carcano M91/38 Cavalry Carbine
Most Italian military policemen are armed with Carcano M91/38 Cavalry Carbines. They are nearly indistinguishable from original M91 Cavalry Carbines, used during WW1.
Fiat-Revelli M1914 machine guns are used by Italian troops.
During the battle in Alps Italian troops use mountain guns. They appear to be Austria-Hungarian 75-mm Skoda Gebirgskanone M15. While these guns weren't used by Italy in WW1, numerous captured M15s were issued to Italian army after 1918 as Obice da 75/13 and used until 1945.