M1863 Springfield barrel with nice markings at breech. At some point, the barrel was cut at the breech and then stretched to 28 5/8". And a visible seam can be seen running through the rear sight "footprint" from when a new section of barrel "tube" was installed onto the original breech. The bore is .58 caliber with correct 3 groove rifling in excellent condition. But we cannot guarantee the structural integrity of this barrel and it is NOT SAFE TO FIRE WITHOUT BEING CHECKED BY A GUNSMITH.