Editing Submachine gun (section)

===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."<ref>Military Small Arms of the 20th Century. 7th Edition. by Ian V. Hogg & John S. Weeks. Krause Publications. 2000. pages 93–94</ref> Most of these survivors were cheaper, easier, and faster to make than their predecessors. As such, they were widely distributed.
[[File:Kpist m 45B Jvm21378 (2).jpg|thumb|A Carl Gustaf m/45]]
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]].<ref>Fredrik Logevall, "The Swedish-American conflict over Vietnam", pp. 199–223 in, Walter L. Hixson (ed), ''Leadership and diplomacy in the Vietnam War'', Taylor & Francis, 2000 {{ISBN|0815335334}}.</ref> As a result, in the following year [[Smith & Wesson]] began to manufacture an m/45 clone called the [[Smith & Wesson Model 76|M76]]. The m/45 was used in combat by Swedish troops as part of the [[United Nations Operation in the Congo]], during the [[Congo Crisis]] during the early 1960s. Battlefield reports of the lack of penetrative power of the 9mm Parabellum during this operation led to Sweden developing a more powerful 9 mm round designated "9mm m/39B".

In 1946, Denmark introduced the Madsen M-46 and, in 1950, an improved model, the [[Madsen M-50]]. These 9 mm Parabellum stamped steel SMGs featured a unique clamshell type design, a side-folding stock, and a grip safety on the magazine housing. The Madsen was widely exported and especially popular in Latin America, with variants made by several countries.

In 1948, [[Czechoslovakia]] introduced the [[Sa vz. 23]] series. This 9 mm Parabellum SMG introduced several innovations: a [[progressive trigger]] for selecting between semi-automatic and full auto fire, a [[telescoping bolt]] that extends forward wrapping around the barrel, and a vertical handgrip housing the magazine and trigger mechanism. The vz. 23 series was widely exported and especially popular in Africa and the Middle East with variants made by several countries. The vz. 23 inspired the development of the [[Uzi submachine gun]].<ref>Hogg, Ian V. (1979). Guns and How They Work. New York: Everest House. p. 157. {{ISBN|0-89696-023-4}}.</ref>

[[File:MP IMG 1690.JPG|thumb|MAT-49 on display]]
In 1949, France introduced the [[MAT-49]] to replace the hodgepodge of French, American, British, German, and Italian SMGs in French service after World War II. The 9 mm Parabellum MAT-49 is an inexpensive stamped-steel SMG with a telescoping wire stock, a pronounced folding magazine housing, and a grip safety. This "wildebeast-like design" proved to be an extremely reliable and effective SMG and was used by the French well into the 1980s. It was also widely exported to Africa, Asia, and the Middle East.