You have the right to a citizen militia, a well regulated one at that. How that became construed to mean everyone can carry a gun is beyond me.
Because "well regulated" was a term used to describe something finely tuned. A fine tuned engine would be called a well regulated engine back in the day. It's curiously simple to see where the right to bear arms for the citizen comes from. It's spelled out clear as black and white.
"A well regulated Militia, being necessary to the security of a free State, the right of the people to keep and bear Arms, shall not be infringed."
The militia was brought together from the people, most who provided their own weapons. See how that works? I'm sure that if there was a ban on guns in the US it would work a lot better than the gun ban in Mexico where tens of thousands of people are killed in the drug war every year, much better than prohibition of alcohol and the ban on drugs. I don't even do drugs but even I know where to get them. As long as there are manufacturers of weapons, there will be sales of weapons.
The big problem with the idea of the gun ban is that the criminals who already deal in black markets will be the ones owning most of the guns. People who are against the sale of guns are really just against the legal sale of guns to law abiding citizens. Why anyone is interested in making the law abiding defenseless against criminals is pretty mind boggling.
Where I live, the biggest threat people have to deal with is domestic violence and sexual assault. My wife is drop dead gorgeous, and as a result gets noticed by all kinds of people, including the dangerous kind. She carries a weapon just in case she ever gets attacked. I'm sure rapists would also like to see her weapons taken away. It sucks for rapists to have to take a chance against a person who is capable and equipped to defend herself. What you have against women... I don't know but it's a little disturbing.