The Warner Carbine 1st Model was made in Springfield, Ma. and 1501 were delivered to the government the second half of 1864. It was 37.5" OAL with a 20" barrel breech loader. It was a propitiatory cartridge .50RF Warner that was basically a shrunk down Spencer 56-56. All 1501 were inspected by CSL C.S. Leonard. It was the first brass frame single shot to be accepted by the government. Approx. 4-500 were issued to the 1st Wisconsin Vol. Cav. . Approx. 500 were re chambered to Spencer 56-56. Very few remain as unchanged caliber. Warners 2nd model were manufactured by Greene Rifle Works in Worcester, Ma.. All 2500 delivered the fist quarter of 1865. They were all 56-56 Spencer. Some other minor changes. None ever were issued , but ended up through dealers as being shipped to France for Franco-Prussian War. This is one of the survivors of the 1st Model. The ejector is similar to a Ballard. Enjoy.