Many people believe the Founding Father's would have been under the impression that weaponry never would advanced beyond muskets.
When the opposite is true, these men were well educated. The history of the Roman Army, Hannibal, and Darius (Persian) would have been part of their lessons. Current wars in Europe, battles in then
colonies, would have been talked about in their current political climate. Spain
The costs, of arms and gun powder were expensive during the Revolutionary War, but afterwards there wasn't nearly a demand so the cost went down.
So, before Michael Moore or anybody else makes another comment that the Founding Father's wouldn't have thunk it.