1825 ca. - Percussion-cap guns are in general use. 1830 - The back action lock appears. 1835 - The first Colt revolver. Samuel Colt developed the first mass-produced, multi-shot, revolving firearms.

Al Capone’s Colt 1911 .45-caliber pistol was so special that he named it “sweetheart”, because it saved his life so many ...