i disagree 
here is why
the second amendment exists as a concept.. " right to bear arms "  The concept exists as a continuum, a range of acceptable behaviors.
From acceptable,  " hmm yah AK 47 is okay --- go for it"    to unacceptable ,  " I want my own nuclear bomb" " hmmm nope, here is your jail cell"
This  range of acceptable non acceptable can be evolved to meet sane safety standards, and easily fall within the purvey of the US constitution .