My favorite small game gun is a S&W model 17 K-22. I have 2 of them. A 6" classic that was manufactured in the 50s and a 8 3/8" that I purchased in the early 80s. I will post pics later. I have a Weaver style rail mounted on the barrel of the 8 3/8" with a 4x scope. I can QD the scope and still use the iron sights when I want.
I have taken all manner of small game and varmints with these guns. They are my favorite range guns.