This piece is a French infringement/copy of the Winchester 1866 rifle, with a 16 gauge shotgun, Damascus barrel and a full magazine tube. The magazine tube slides inside a fixed tube below the barrel. Three and 1/2 inches of the sliding tube are used as a handhold to pull out the tube. When the tube is withdrawn, shotshells can be put into the fixed tube from the muzzle end. As the inner tube is returned to its place, it passes over or around the shells in the fixed tube, and the magazine spring in the inner or sliding tube is compressed. Oliver F. Winchester had a patent for this type of magazine dated September 4, 1866, patent #57,808.