The Civil War Guns were smooth-bore, shoulder
rifles, and they were the most important weapons in the War.
The rifled barrel improved
range and accuracy, the breech-loading system made loading
easier, and the percussion lock increased reliability to make
Civil War rifles a deadly effective weapon. These developments
brought these civil war weapons into the modern age. Military
developments during the American Civil War included rifled
muskets, cartridge rounds, repeating rifles, gatling guns,
rifled cannons and more.