Minn. Stat. § 97B.045
Subd. 1. Restrictions.
A person may not transport a firearm in a motor vehicle unless the firearm is:
Subd. 2. Exception; disabled persons.
The restrictions in subdivision 1 do not apply to a disabled person if:
Subd. 3. Exceptions; hunting and shooting ranges.
(a) Notwithstanding provisions to the contrary under this chapter, a person may transport an unloaded, uncased firearm, excluding a pistol as defined in paragraph (b), in a motor vehicle while at a shooting range, as defined under section 87A.01, subdivision 3, where the person has received permission from the lawful owner or possessor to discharge firearms; lawfully hunting on private or public land; or traveling to or from a site the person intends to hunt lawfully that day or has hunted lawfully that day, unless:
(b) For the purposes of this section, a "pistol" includes a weapon designed to be fired by the use of a single hand and with an overall length less than 26 inches, or having a barrel or barrels of a length less than 18 inches in the case of a shotgun or having a barrel of a length less than 16 inches in the case of a rifle:
(2) for which the propelling force is a spring, elastic band, carbon dioxide, air or other gas, or vapor.
Pistol does not include a device firing or ejecting a shot measuring .18 of an inch, or less, in diameter and commonly known as a "BB gun," a scuba gun, a stud gun or nail gun used in the construction industry, or children's pop guns or toys.