Arms is an inclusive term, the founders intent was that it include artillery as well as any other defensive weapon useful against the armies of a tyrant.
"Ben Franklin was in France to obtain financial aid and a military alliance with the French."
Secondary after his primary task was accomplished.
"Cannons were not owned by individuals during the Revolution what concoction of crap did you get that gem from?"
Who owned them, the ACME leasing co? Were they communal property on loan from the king? They were private property.
"The right to bear arms is just that."
Folks should focus on that thought, because Freedom depends on maintaining that right absolutely. FMCDH, if you dare.