This is a list of infantry weapons which were in mainstream use during World War II (–). Contents. [hide]. 1 Kingdom of Albania; 2 Commonwealth of Republic of China · Republic of Finland · The Third Reich (Nazi · Empire of Japan. World War II saw rapid technological innovation in response to the needs of the various combatants. Many different weapons systems evolved as a result. List of World War II firearms of · United States · List of Soviet Union military. The secret of American victory in World War II was quantity and quality. Copious amounts of weapons and equipment that not only.