Can some one tell me about this gun-- it was a 5 shot .44 caliber 5 shot precussion,British Mfg. It on a display in Claremore Ok Gun Mus.It was my uncles in the Civil War-(its engraved with his name 2 Indian Cavalry)I thought it was stopped being made by, the end of the war would that make it more rare--it, I think was a rival to the Colt revolver?