Model 1862 Type II hand-cranked rapid-fire gun SPAR 58 cal
Early Gatling guns, such as this .58-caliber RF 1862 model, with a half-dozen 33-inch barrels, had a rate of fire of 600 rpm, an overall length of 64-inches and a weight, with carriage and limber, of about 630 pounds, unloaded. (Photo: Springfield Armory National Historic Site)