Originally Posted by Daryl Hallquist
Part of the story are the Roper revolving shotguns. These guns , circa 1870 , had a choke that was screwed on to the muzzle, Presumably the screw on choke could be had in different constrictions, although I have never seen a Roper shotgun offered with more than one choke ring.

Fascinating, Daryl. I had to Google that one. So removable chokes aren't so new after all.