if such an airgun don't need a gun licence everything is fine, its a fortunate country. I would not use them for big game but they are fine if you have a rabbit problem https://www.youtube.com/watch?v=ndAzw9SUaLc

but we have not seen rabbits here for over 30 years when they were eradicated completely by myxomatosis. and no, its forbidden to return them because they are a plague.