The "Swedish K", produced by the Carl Gustaw company, designated the M45, was a 9mm SMG. It was very popular with Special Operations types in Vietnam, but the Swedish ceased importation of it because they opposed the American invovlement in Vietnam, leading S&W to manufacture the 76, which was a copy, but superior in a few regards.
NRA Life Member
Ladyfriend: "I need help with the leaves in the yard"
Me: "Controlled burn?"
LadyFriend: "I forgot my Boy Scout turned into an infantry officer."