I don't know a lot about these airguns but someone here might.
I hear Bulgaria is a beautiful country. My friend loved Bulgaria. The only drawback he mentioned was lots of stray dogs running around.
And I have heard of many European countries with stupid self defense laws like this. You basically have to survey your attacker's weapon then fight them off with the same kind of weapon - or a weapon less deadly than what they are using - or you will end up in jail.