"I don't think the Framers or Founding Fathers had issues like this to grapple with."

Then you need to do some more reading about available weaponry at the time of the founding.

https://en.wikipedia.org/wiki/Puckle_gun

At a later public trial held in 1722, a Puckle gun was able to fire 63 shots in seven minutes (approximately nine rounds per minute) in the midst of a driving rain storm.