Interdynamic MP-9

The Interdynamic MP-9 is a blowback operated, fully automatic 9x19mm Parabellum submachine gun developed by Interdynamic AB of Stockholm, Sweden, originally as a military design that failed to interest any government and was produced only between 1983 and 1984 in numbers believed to be fewer than fifty. Interdynamic's American subsidiary later sold a semi automatic civilian version called the KG-9, which after design changes required by the United States Bureau of Alcohol, Tobacco and Firearms became the KG-99. The MP-9 itself, an open bolt weapon firing at about 1,000 rounds per minute from magazines of 10 to 50 rounds, was offered either with a collapsible stock in select fire form or without a stock as the fully automatic K-9 variant. This description is adapted from Wikipedia contributors under CC BY-SA 4.0; changes were made. https://creativecommons.org/licenses/by-sa/4.0/