DontBeStupid
Look it up!
which also means upgrades to keep up with the times
That would only apply if you believe the Constitution is a living document. As we all know, there are A LOT of people in this country who do not think that way. In fact, the vast majority of conservatives don't. They are the first ones to point out that the Constitution does not contain the word "abortion", so therefore, women don't have the right to have one. Nor "marriage" mentioned, therefore people do not have the right to choose who they want to marry. Also, "health care" and "education" are never mentioned, and therefore no one has the right to either.
So, taken that as our standard for applying the Constitution, we have to reason that since "M-16" is never mentioned, we therefore do not have a Constitutional right to own one.