Yes Hello I am from Sweden!
I have actually never ordered any modelguns myself but only bought them used and such from others here in Sweden.
From my understanding is that yes. Modelguns are legal in Sweden cause they do NOT use gas sealed cartridges.
However the gun laws in Sweden in general are kind of a grey zone in some areas. For example model guns.
So techincally you are allowed to own and use model guns in Sweden. The Swedish custom service however doesnt ALWAYS know these rules though and just think its a gun.
So ordering outside the country is kind of a lottery. If you are lucky, the customer service officer know the laws and such. And let it proceed. And then there is the other ones..
Please note however this is just from what I heard so I might be super wrong. I know there are some other fellow Swedish users on here who probably can give you a more satisifying ansver :>
Cheers