For sale a Mx 3 single barrel 34 inch ,round mono block stamped cc sietz ,740 bore ,20 thousands constriction.ported ,it has a choke tube but was told it is in there to stay as that is the way Tom Seitz done the ones with choke tubes.it is machined and drilled for a barrel weight ,it is a very clean barrel with very good blueing 575.00 shipped