New scope.

I'm thinking of getting a bug buster for my 220.Gamo. Any advise on mounts.are they close enough to the eye or do I have to get a special mount?
     Right now I'm doing most of my shooting in the basement(13yds.)I will be doing most of my shooting at 15 to 20yds. 15yds to the bird feeders-20yds to the tree closest to it.GAME.....sterlings..squirles..and ENGLISH SPARROWS.
     Any and all help will be greatly appriciated.
                                                        John in Ohi