Excerpt: On this day in 1981, President Ronald Reagan was shot in the chest at the side entrance of the Washington Hilton on Connecticut Avenue by John Hinckley Jr. Reagan was walking to his limousine after a speech to AFL-CIO leaders when Hinckley, 25, who was standing among a group of reporters, fired six shots, hitting Reagan and three others.
Given that overall length was a major factor, there was a short list of comparable arms that are 18.5 inches or less to choose from.