No, is not very clear, they don't even mention firearm calibres, gun power, machine guns, the drug war, automatic weapons, chemical weapons, missiles, nuclear artifacts, criminals with guns, tanks and other kinds of military vehicles, grenades; basically because back then those things didn't even existed or where not considered relevant. Today is a very different world that they didn't imagine even in their wildest dreams; is a romantic but childish illusion that their words can be literally applied to a world so different to the one they saw.

I'm nitpicking, and/or don't understand what you've written, it appears that you're making an argument for repealing the second amendment rather than making an argument that it isn't clear what was meant by the second amendment.