In 1938, the basic Model 91 long rifle design was discontinued in favor of a new short rifle design, the Model 38, with a new type of ammunition: a spitzer-pointed 7.35×51mm round. The 7.35mm M38 was manufactured from 1938 to 1940. In 1940, with the war well under way and unable to stockpile sufficient amounts of 7.35×51mm ammunition, the short rifles were re-designated "Modello 91/38", and were again manufactured to fire the original round-nosed 6.5×52mm ammunition. The serial-numbered C2766 rifle, sent to Oswald as a surplus advertised "Italian carbine" in 1963, was a short infantry rifle of this type (though technically not a "moschetto" carbine model), manufactured for the 6.5×52mm cartridge. This 6.5mm Carcano M91/38 was only manufactured for two years, 1940-1941, and discontinued in favor of a new 6.5mm long rifle, the M91/41, which was made until the end of the war.