Need that reminder on occasion.
Multi-barrel guns (2 to 20!) were not uncommon.
The “Puckle Gun” was basically a machine gun well before 1776.
Lewis & Clark took a 20+ shot semi-automatic _air_gun_ equal in force to a modern .45ACP.
A 20-round semi-auto musket was known, if a bit irritating to load.
And then, of course, there were many privately-owned cannons, and the “Letters of Marque” part of the Constitution was to give Congress’ approval to private citizens taking full-blown battleships out to wage war on other countries.
Yeah, the Founding Fathers were well aware they meant ALL weapons, then and future. Anyone arguing to the contrary need have their “freedom of the press” limited to movable-type hand-operated press circa 1776.
“I’ll take an M1 Abrams, and a side of fries.”
They also included a clause authorizing Congress to create a patent and trademark office that would issue patents, trademarks, and copyrights, all to promote and advance the useful arts. Hence, they didn’t just realize that people would be developing more and better firearms over the coming centuries; they affirmatively encouraged it and knowingly, deliberately went on to protect it constitutionally by adopting the Second Amendment.
Did all 11 shots fire from a single flintlock strike? Or was it a semi-auto?