At 5 to 20 ft you'll do a lot of overshooting with a scope, depends on height above bore. For a cheap scope I have a couple of Bug busters, one fixed 6x on a modded Crosman 2240 and a 3-9 for a Savage 64. Waiting for the offset mount for the Savage so don't know how it will work out. On the air gun for short range shooting in the garage it is great. Have a shooting gallery type target set-up with self resetting targets and a rotating gong about 20 ft. The 6x was impressive enough to warrant buying the 3-9 for my loaner gun. The rest of my scopes are a tad more expensive.