No, it's not.  That's why interpretations of ideas and principles developed over two hundred years ago occur.  Do you really think that machine guns and assault rifles could have been predicted in 1776?  Do you think that words mean the same today as they did 250 years ago.  Are you a fundamentalist in your adherence to the Constitution which was designed to be an evolving guide to democracy?   Maybe you just like guns.  Maybe you have some type of emotional attachment to guns and what they might represent to you.  Life is not so straight forward.