I have a set of K80 30" step rib O/U barrels that have been worked by Eyster and have the original paperwork for work done.. He opened the bore to 745 and has the fixed chokes at 18th top and bottom for sporting clays. The block ears are excellent and the ser # stamped on the barrel is 20732 . The bluing is good and the ejectors have been honed to work on a K32 receiver or it will still work on a K80 receiver. (( $1700 Delivered to your address in the Lower 48 )) Any questions please send a conv message for info and contact # -- Thnaks Bob