Yup, the M-76. Originally the Swedish K found it's way into a few covert ops in Vietnam and when the Swedes found out about that, they quit selling them to the US. Although strangely, they did liscense the design to the Egyptians as the Port Said.
Anyways, after that, S&W worked with the design and came up with the M-76 that was very similar in design and performance. They did have a seperate safety/selector lever that was an improvement over the L-notch in the cocking handle track of the Swedish K and also had the ability for semi-auto fire versus the Swedish K's full auto only feature. Personally, I've always wanted one since seeing Charles Hesston wield one in "The Omega Man".