I believe the Second Amendment guarantees an individual right to keep and bear arms. The Supreme Court agrees with me, which means that right is as valid as abortion, sexual privacy, protest and speech.
This should mean that strict scrutiny applies, meaning the government needs to prove the fabric of society itself is at risk before limiting it. Just as the Press has the right to broadcast troop movements it can see or acquire, regardless of casualties, I have the right to own weapons, regardless of how someone else may act. "Someone might get hurt" is an invalid excuse for restriction.
In fact, it's easy enough to prove that freedom of the press HAS caused harm and even death to people, whether it's troop movements, or the address of a person of interest.
The rights of gays to relate as they wish brings the risk of AIDS (60% of all cases are from gay relations, not drugs or medical contamination.)
It's provable that if we required proof of need before awarding a driver's license, we'd have less car accidents.
So, the argument that "guns kill people" is null and irrelevant to the discussion. Lots of things kill people. That's not relevant to our civil rights.