Air rifles are vastly under rated in the USA.
I own a comparable rifle from Theoben - it outperforms a .22 rimfire at close range. Note the range involved in the link smile
The higher power ones are treated as "firearms" in many parts of the world for good reason.
I'm also biased in thinking that given a choice where you put the bullets is of more importance than the size or number the bullets but that's another story smile
Jeremy