Many of the controls proposed in 1934 might well have hindered the availability of the more powerful firearms found on American streets today. Discussions included the need to regulate high-capacity ammunition magazines and bulletproof vests. The committee considered, and abandoned, machine gun definitions that would have had a tremendous impact on today's firearms violence. Under the National Firearms Act, a machine gun is defined as "any weapon which shoots ... automatically more than one shot without manual reloading, by a single function of the trigger." The committee had weighed other, more restrictive, definitions that would have capped civilian firepower. One would have classified "any weapon designed to shoot automatically or semiautomatically twelve or more shots without reloading" as a machine gun. A second would have classified as a machine gun "any weapon which shoots ... automatically or semiautomatically, more than one shot, without manual reloading, by a single function of the trigger." The first definition would have limited the public to weapons capable of holding only twelve rounds or less, the second would have limited it to single-shot weapons.