<P> Weapons transport To carry and use weapons of the fourth category, they must be documented individually by a weapon card according to article 105 of the Weapons Regulation . Articles 146, 147, 148 and 149 of said Weapons Regulation also apply . </P> <P> One must be at least 18 years old to buy and use airsoft firearms . Minors (under the age of 18) can practice targetshooting under supervision by the legal guardian of the minor . </P> <P> In order to possess a CO, air, or spring operated firearm without a license, the impact energy of a projectile fired at a distance of four meters (from the muzzle) must be less than ten joules . </P> <P> As of 2 January 2015 it is legal to own and import gas operated airsoft weapons without special permits in Sweden . </P>

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