 The only Japanese submachine gun, the Type 100, was limited in number, and lacked the reliability or stopping power of the Thompson.Ammunition was usually in US 42-round Lend-Lease commercial cartons or Australian 28-round military cartons captured from the Commonwealth forces that was sampled, tested, and resealed with Japanese arsenal stickers.Models used in the Pacific by Australian troops had their sling swivels remounted on the left side to allow it to be fired more easily while prone.