Any shotgun that fits and feels good to you is a good waterfowl gun. Pump,Auto,O/U there all good to go. If you insist on 3 1/2" one might as well go to a 10 ga. If you still want a 12 ga 3 1/2 go look on the used rack some of the bigger places like Gander ,Cabelas you'll usually find alot of them.