Just like you have your own human rights maybe this is from your own statistics too because the cdc.gov and other recognized institutions show nothing about the legality of the weapons used in murderess.
Human rights are the rights that should be respected by anyone; if you need some sort of self-defense by definition you are taking actions derived from a violation of your rights; so your self-defense is already out of any kind of human rights paradigm.
And self-defense is one of the most ambiguous concepts there are; if Palestinians could use an atomic bomb in Israel it would be self-defense? I think it would be, but it also would be wrong, very wrong.
USA is the developed country with the highest death rate by gunshots[1]; as much as you like to believe your own words data is not at your side.
[1]http://en.wikipedia.org/wiki/List_of_countries_by_firearm-re...