Citation(s) from the GunPolicy.org literature library
Cage, Feilding, Greg Chen and Gabriel Dance. 2013 ‘Gun Laws in the US, State by State - Interactive.’ The Guardian. New York, NY: The Guardian. 16 January
Gun Laws in the US, State by State - Interactive
[T]he majority of gun legislation in the US is enacted at the state level. That has brought broad variations across the country, with states taking different approaches to issues ranging from sales, permits, licensing, self-defence and carry laws.
[This interactive data visualisation allows easy comparison of key gun control laws across five American regions and the 50 United States.]