The Fiat G.55 is an Italian fighter aircraft developed during World War II. It was designed by Fiat and first flew in 1942. The G.55 was known for its powerful engine, excellent maneuverability, and robust construction, making it one of the best fighters of its time. Equipped with a 20mm cannon and four .12.7mm machine guns, the G.55 was effective in combat. It served primarily with the Regia Aeronautica, the Italian Royal Air Force, and was later used by the Luftwaffe and Aeronautica Nazionale Repubblicana during the war.