In a pistol, a contender with 14" barrel a large volume suppressor shooting the weakest charged heaviest projectile you could find.
However this is a poor shooting weapon. It would be long and bulky, inaccurate and ineffective.
You are saying the contender pistol is inaccurate? Mine is not. It is about the same as my Marlin and Ruger 10/22 rifles (non match grade) as accuracy is concerned. Better than my 10 inch bull barrel Buckmark, Winchester 06 and wayyyyyyy better than my P-22. Yeah it is a long bulky break open single shot, but if you hit the target on the first shot, then that is all you need.