[thackney]

The “Puckle Gun” was basically a machine gun well before 1776.

Did all 11 shots fire from a single flintlock strike? Or was it a semi-auto?

[ctdonath2]

Turn a crank. As the single operation of turning the crank continues, more shots occur. (This in contrast with the pull-release-pull-release of a semi-automatic.)
Not quite a “machine gun” as legally defined today, but so close as to make no practical difference.