Finland
Airsoft guns are not treated as firearms in law, but visible transportation of any replica firearms in public areas is forbidden. All replica firearms must be covered with something, for example, a firearm case, when moving on public area. Land owner's permission is needed to play airsoft in any area.
Minors (under the age of 18) are able to purchase airsoft guns only with written permission from their legal guardians. ...
Read more about this topic: Legal Issues In Airsoft