Type 100 submachine gun, based heavily on the German MP28. Like most other small arms created in Imperial Japan, the Type 100 could be fitted with a bayonet. It used the 8×22mm Nambu cartridge, which was about half as powerful as a standard Western 9 mm Parabellum round. Production of the gun was even more inadequate: by the war's end, Japan had only manufactured about 7,500 of the Type 100, whereas Germany, America, and other countries in the war had produced well over a million of their own SMG designs. The German military concluded that most firefights took place at ranges of no more than about . They therefore sought to develop a new class of weapon that would combine the high volume of fire of the submachine gun with an intermediate cartridge that enabled the shooter to place accurate shots at medium ranges (beyond that of the range of the typical submachine gun). After a false start with the FG 42, this led to the development of the select-fire assault rifle (assault rifle is a translation of the German ). In the years following the war, this new format began to replace the submachine gun in military use to a large extent. Based on the StG44, the Soviet Union created the AK-47, which is to date the world's most produced firearm, with over 100 million made. Post World War II After World War II, "new submachine gun designs appeared almost every week to replace the admittedly rough and ready designs which had appeared during the war. Some (the better ones) survived, most rarely got past the glossy brochure stage." Most of these survivors were cheaper, easier and faster to make than their predecessors. As such, they were widely distributed. In 1945, Sweden introduced the 9 mm Parabellum Carl Gustaf m/45 with a design borrowing from and improving on many design elements of earlier submachine-gun designs. It has a tubular stamped steel receiver with a side folding stock. The m/45 was widely exported, and especially popular with CIA operatives and U.S. Special Forces during the Vietnam War. In U.S. service it was known as the "Swedish-K". In 1966, the Swedish government blocked the sale of firearms to the United States because it opposed the Vietnam War. As a result, in the following year Smith & Wesson began to manufacture an m/45 clone called the M76. The m/45 was used in