Production figures were obtained under the Freedom of Information Act from the Bureau of Alcohol, Tobacco, and Firearms (ATF). Manufacturers whose annual output did not exceed 1,000 firearms for any given year were not included in this study, which also did not cover imported weapons. This document lists manufacturers alphabetically by licensee name or most commonly known trade or product name. Manufacturers include companies that produce finished firearms as well as those that produce components that the ATF counts as firearms, i.e., receivers. Caliber listings include not only all handguns produced of that caliber, but intermediate calibers that are greater than the previous caliber listing (for example, 40-caliber pistols are included under the 45- caliber listing).