The K4 compact subgun project from Argentina

The family of very compact submachine guns that came from the creative mind of Gordon B. Ingram starting in the mid-1960s and subsequently series manufactured in the U.S. by the Military Armament Corporation (the .45ACP M10) and the SWD company (the 9x19mm Cobray M11) in the 1970-80 period or so may not have become true operational winners, but their general conceptual idea (“firepower in a very compact  package”) did call the public  –if not LE and military –attention. As you sure know, this resulted in a large number of close copies appearing in different parts of the world, South America included.

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