Macchi C.205N Orione

During the course of 1941, the chief engineer Mario Castaldi, who designed all Macchi C.200, C.202 and C.205, among many others, came up with a proposal for a fighter powered by the DB605A engine, in order to comply with a requirement of the Ministerio dell'Aeronautica (Air Ministry).
Castoldi's design featured a new redesigned wing with longer span ,aspect ratio and taking the centre, aft and tail sections from the C.202. This new fighter was designated as the C.205N where the N stands for nuovo (meaning "new" in Italian) and was nicknamed as Orione ("Orion).
The first prototype, the Macchi C.205N1 was flown for the first time on 1st November 1942 and was armed with four 12.7mm Breda-SAFAT machine guns mounted in the fuselage plus one 20mm cannon bulge-fitted in the side of the fuselage. One thousand two hundred of them were ordered with additional 600 of them to be license-built by Breda.
Shortly later, a second prototype, the C.205N2 flew for the first time on 19th May 1943 with modified weaponry arrangement, as it had just two 12,7mm Breda-SAFAT machine guns and two 20mm cannons, this time placed in the wings. As the war progressed, it was clear that the mass production of the Orione wasn't viable and therefore the orders were cancelled.

Sources:
1. Salamander Books - The Complete Book of Fighters
2. https://en.wikipedia.org/wiki/Macchi_C.205