sentences:  After the Civil War, revolvers using fixed metallic cartridges came into widespread use.The Colt Navy remained in production until 1873, being replaced in the Colt line with what would become one of the manufacturer's most famous handguns, the Colt Single Action Army (also known as the "Peacemaker" and "Colt 45").Total production numbers of the Colt 1851 Navy Revolver were exceeded only by the Colt Pocket models in concurrent development, and numbered some 215,000 domestic units and about 42,000 produced in the Colt London Armory.