Seeking a guide from our Founders for treating cannon and other "WMD"s of the time we find that they were regulated under the "laws of nations" preexisting the Constitution and accepted by the Founders.
But OTOH that's a good point to draw the line anyway isn't it?
Laws of Nations? Bwahahahahahaaa!!! ROTFLMAO!!! Utter looney. Using your reasoning now, we never should have rebelled against the Crown.
You are reaching and falling flat on your ass.