The Civil War was fought right in the middle of a major firearms transition, so you see a real mix of old and new technology on the battlefield. Most infantrymen carried percussion-cap rifled muskets like the Springfield 1861 or the British Enfield, firing the Minie ball and giving soldiers much better range and accuracy than earlier smoothbores. Early in the war, though, plenty of troops -especially in the South- were still using smoothbore muskets such as the old .69 caliber Springfields, often loaded with buck-and-ball for brutal close-range fighting. Cavalrymen and specialists tended to carry shorter carbines like the Sharps, Burnside, or Spencer, and in a few units, repeating rifles like the Spencer or Henry really changed the game with their higher rate of fire. For sidearms, percussion revolvers from Colt and Remington in .36 and .44 caliber were the norm and showed up everywhere.