Not an expert on Constitutional Law, I was using the example that in Government can limit the type of arms people can buy legally, such as fully automatic machine guns. It can re-apply the limit to a more sensible level.
However as Robbie pointed out it's possible to amend the Constitution. As there has never been a referendum on the subject. You don't know what Americans want. Would most agree to tighter gun sale laws, a limit on magazine size, bullet power, whether people on a terrorist watch list should own guns, etc?
You don't know that.
Some people think the Government has too much power.
Like these people. They want the freedom to do exactly as they please and ignore the law.
The second amendment has been changed from what was originally written.
If the right extends to idiots such as those in the link I posted. It infringes the security of a free State. And promotes anarchy. If you say it does extend to these idiots, then it extends to the insane and criminals.
If you want to apply the Constitution as it was intended.
Equal Rights for Some - American History - Quatr.us
There's lots more on this subject about who they were applying the Constitution to.