In the 80's - early 90's American Arms used to import a waterfowlers & turkey hunters special, the earlier ones had fixed chokes later had screw in chokes. Found a new in box waterfowler w/ screw in chokes at a gun show a couple of years ago for a good price but passed on it, still kicking myself for it
![blob10 :blob10:](https://oldgobbler.com/Forum/Smileys/classic/blob10.gif)
You can still find them on gunbroker ever now and then.