Since they are all shipped from the same warehouse..
"hunting (squirrel, rabbit), pest control"?
Better stay away from the B40.. It's too heavy for to carry around very much.
A better choice might be the B26.
http://bestairgun.stores.yahoo.net/bamxsairri1.html
It's cheaper, so you can afford a better scope & ligher,
maybe even safer to operate..
Cheers,
Rich
Hard work never killed anybody, but why take a chance?