What would be a good scope for a Ruger 10/22 or a 60 or 795?

Im using .22 shorts, .22 CBs, and .22 BBs. Right now I have an AirForce 4-16x50AO air rifle scope on it, but I need it for something else. Most of my shooting is under 50 yards. And please, don't suggest rediculously expensive scopes.