I love my sweet 16 that took me 3 years to find the right configuration, but with all Belgium made Sweet Sixteens they are of a fixed choke. The Imp Cyl that I have works great on Morning dove,and opening day pheasant. It is somewhat handicapped when dealing with high flying White wing dove, and spooky pheasant. So the search began again. I scoured the "net" and found nothing at a reasonable price. Then as part of my normal routine I stopped into a local pawn shop and spotted an older Browning non-sweet sixteen with the right barrel. Started the month long negotiation, and arrived at a fair price for both parties. So, I bought a whole gun just to take the barrel(full choke vent rib). So far it appears it fits tight, and locks up as well. Now I am hoping to find any low cost barrel to put on the receiver, and recover some money.