https://docs.legis.wisconsin.gov/statutes/statutes/948/605
948.605 Gun-free school zones.
(1) Definitions. In this section:
(a) "Encased" has the meaning given in s. 167.31 (1) (b).
(ac) "Firearm" does not include any beebee or pellet-firing gun that expels a projectile through the force of air pressure or any starter pistol.
(am) "Motor vehicle" has the meaning given in s. 340.01 (35).
(b) "School" has the meaning given in s. 948.61 (1) (b).
(c) "School zone" means any of the following:
1. In or on the grounds of a school.
2. Within 1,000 feet from the grounds of a school.
(2) Possession of firearm in school zone.
(a) Any individual who knowingly possesses a firearm at a place that the individual knows, or has reasonable cause to believe, is in or on the grounds of a school is guilty of a Class I felony. Any individual who knowingly possesses a firearm at a place that the individual knows, or has reasonable cause to believe, is within 1,000 feet of the grounds of a school is subject to a Class B forfeiture.
(b) Paragraph (a) does not apply to the possession of a firearm by any of the following:
1m. A person who possesses the firearm in accordance with 18 USC 922 (q) (2) (B) (i), (iv), (v), (vi), or (vii).
1r. Except if the person is
in or on the grounds of a school, a licensee, as defined in s. 175.60 (1) (d), or an out-of-state licensee, as defined in s. 175.60 (1) (g).