Machine Gunnin' Rocksteady (Wacky Action Figures) 1991

The gimmick has the action of firing a machine gun when you turn the screw! Of course they are valuable, but I recently noticed a low collection achievement rate of Bebop and Rocksteady figures in my collection. Despite being my favorite character 🐗🦏 So I would like to gradually collect them. Is there an exchangeable person? What I especially want is Robotic Series and Sewer Heros!