The Firearm Owners' Protection Act (FOPA) of 1986 is a United States federal law that revised many provisions of the Gun Control Act of 1968. Federal firearms law reform Under the Gun Control Act of 1968, the Bureau of Alcohol, Tobacco and Firearms (ATF) was given wide latitude on the enforcement of regulations pertaining to holders of Federal Firearms Licenses (FFL) (which enable an individual or a company to engage in a business pertaining to the manufacture or importation of firearms and ammunition, or the interstate and intrastate sale of firearms). Allegations of abuse by ATF inspectors after passage of the act arose from the National Rifle Association (NRA) and some FFL licensees. In particular, advocates claimed that ATF was repeatedly inspecting FFL holders for the apparent purpose of harassment intended to drive the FFL holders out of business (as the FFL holders would constantly be having to tend to ATF inspections instead of to customers). A February 1982 report by the Senate subcommittee that studied the Second Amendment to the United States Constitution concluded: The report also said that 75 percent of ATF prosecutions "were aimed at ordinary citizens who had neither criminal intent nor knowledge, but were enticed by agents into unknowing technical violations." It suggested that reform of federal firearms law such as proposed in S. 1030 "would be largely self-enforcing" and "would enhance vital protection of constitutional and civil liberties of those Americans who choose to exercise their Second Amendment right to keep and bear arms." The Firearm Owners Protection Act of 1986 (FOPA) addressed the abuses noted in the 1982 Senate Judiciary Subcommittee report. Among the reforms were the reopening of interstate sales of long guns on a limited basis, legalization of ammunition shipments through the U.S. Postal Service, removal of the requirement for record keeping on sales of non-armor-piercing ammunition, and federal protection of transportation of firearms through states where possession of those firearms would otherwise be illegal. The Act also contained a provision that banned the sale to civilians of machine guns manufactured after the date of enactment, restricting sales of these weapons to the military and law enforcement. Thus, in the ensuing years, the limited supply of these arms available to civilians has caused an enormous increase in their price, with most costing in excess of $10,000. Regarding these fully-automatic firearms owned by private citizens in the U.S., political scientist Earl Kruschke