Colt Revolver - The most popular handheld firearm used by the Union Army was the Colt Revolver.
Rifles
Springfield Model 1861 - The common rifle used by soldiers of the Civil War. It was well known for its range, accuracy, and reliability. It was the first rifle that did not require flintlocks.
Gatling Gun
Gatling Gun - The Gatling Gun was the first machine gun ever used in war. It could fire up to 300 rounds per minute and could fire for long periods of time without overheating.