Replica Le Matt Pistol with working action. The Le Mat revolver was a .42 or .36 calibre cap & ball black powder revolver invented by Jean Alexandre Le Mat of New Orleans in 1856, which featured a 9 shot cylinder and a secondary 20 gauge smooth-bore barrel capable of firing buckshot. It saw service with the armed forces of the Confederate States of America during the American Civil War. The were made until 1865, by which time approximately 3000 had been made.