"Congress has debated the efficacy and constitutionality of federal regulation of firearms and ammunition, with strong advocates arguing for and against greater gun control. The tragic shootings in Tucson, AZ, on January 8, 2011, in which six people were killed and 13 wounded, including Representative Gabrielle Giffords, could prompt the 112th Congress to examine issues related to the shooter's mental illness and drug use (see S. 436) and his use of large capacity ammunition feeding devices (LCAFDs) (see H.R. 308 and S. 32), as well as a proposal to ban firearms within the proximity of certain high-level federal officials (see H.R. 367 and H.R. 496). Other emerging issues include the Bureau of Alcohol, Tobacco, Firearms and Explosives's (ATF) proposal to require multiple rifle sales reports from Southwest border state gun dealers and its conduct of Operation Fast and Furious. More recently, gun-related amendments to bills reauthorizing USA PATRIOT Act provisions were considered (H.R. 1800, S. 1038, and S. 990), but were not included in the enacted legislation (P.L. 112-14). To set these and other emerging issues in context, this report provides basic firearms-related statistics, an overview of federal firearms law, and a summary of legislative action in the 111th Congress. […] The report concludes with discussion of other salient and recurring gun control issues that have generated past congressional interest. Those issues include (1) screening firearms background check applicants against terrorist watch lists; (2) reforming the regulation of federally licensed gun dealers; (3) requiring background checks for private firearms transfers at gun shows; (4) more-strictly regulating certain firearms previously defined in statute as 'semiautomatic assault weapons'; and (5) banning or requiring the registration of certain long-range .50 caliber rifles, which are commonly referred to as 'sniper' rifles."
CRS Report for Congress, RL32842