The LeMat revolver was a .42 or .36 caliber cap & ball black powder revolver invented by Jean Alexandre LeMat of New Orleans, which featured an unusual 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 of 1861–65 and the Army of the Government of National Defense during the Franco-Prussian War.
In this work, I present the LeMat revolver in my modern modification for firing bullets. The weapon is equipped with two barrels with a rotating cylinder that serves as a magazine for two calibers, with a break-action. To shoot a buckshot, the lower half of the front of the trigger is pulled down with a finger, for firing bullets it is returned up to its original position.