Available for purchase is this Smith & Wesson Model 916T, 12 gauge, Smooth Bore Slug Barrel. Barrel has rifle sights and it is 20" in length. Barrel is for 3" Shells. Barrel retains 99% original blueing with a mirror bore. Barrel was made in Springfield, Mass. USA.  Barrel has a Cylinder Bore Choke. Very nice barrel for your home defense or hunting needs. Questions, just email. Thank you.