The Smith artillery model has no sling bar or sling but it does have two swivels. This is an original 50 caliber carbine. The serial # is 7976. The metal has a smooth lovely even brown patina. The frame has deep clear markings ” ADDRESS / POULTRY & TRIMBLE / BALTIMORE U.S.A.’ ” SMITH’S PATENT / JUNE 23, 1857″ “MANUFACTURED By MASS ARMES & CO CHIOCPEE FALLS. The stock has 2 inspector cartouches with normal scratches and dings from use. The frame hinge is tight and appears to have no wear. The carbine has a crisp tight action. The bore bright and clean and in very fine condition. It will make a great shooter as well as a collector Civil War carbine.