If you read below the apendix and bibliography, you'll notice a report on enforcement of federal gun laws, and that is a must read for everyone. Here's an excerpt:
[i]These practices, amply documented in hearings before this Subcommittee, leave little doubt that the Bureau has disregarded rights guaranteed by the constitution and laws of the United States.
It has trampled upon the second amendment by chilling exercise of the right to keep and bear arms by law-abiding citizens.
It has offended the fourth amendment by unreasonably searching and seizing private property.(p.23)
It has ignored the Fifth Amendment by taking private property without just compensation and by entrapping honest citizens without regard for their right to due process of law.
The rebuttal presented to the Subcommittee by the Bureau was utterly unconvincing. Richard Davis, speaking on behalf of the Treasury Department, asserted vaguely that the Bureau's priorities were aimed at prosecuting willful violators, particularly felons illegally in possession, and at confiscating only guns actually likely to be used in crime. He also asserted that the Bureau has recently made great strides toward achieving these priorities. No documentation was offered for either of these assertions. In hearings before BATF's Appropriations Subcommittee, however, expert evidence was submitted establishing that approximately 75 percent of BATF gun prosecutions were aimed at ordinary citizens who had neither criminal intent nor knowledge, but were enticed by agents into unknowing technical violations. (In one case, in fact, the individual was being prosecuted for an act which the Bureau's acting director had stated was perfectly lawful.) In those hearings, moreover, BATF conceded that in fact (1) only 9.8 percent of their firearm arrests were brought on felons in illicit possession charges; (2) the average value of guns seized was $116, whereas BATF had claimed that "crime guns" were priced at less than half that figure; (3) in the months following the announcement of their new "priorities", the percentage of gun prosecutions aimed at felons had in fact fallen by a third, and the value of confiscated guns had risen. All this indicates that the Bureau's vague claims, both of focus upon gun-using criminals and of recent reforms, are empty words.[/i]