Transporting or possessing firearm in or upon motor vehicle or self-propelled vehicle designed for land travel; violation as misdemeanor; penalty.

Mich. Comp. Laws § 750.227d, under THE MICHIGAN PENAL CODE.

Mich. Comp. Laws § 750.227d

Sec. 227d. (1) Except as otherwise permitted by law, a person shall not transport or possess in or upon a motor vehicle or any self-propelled vehicle designed for land travel either of the following: (a) A firearm, other than a pistol, unless the firearm is unloaded and is 1 or more of the following: (i) Taken down. (ii) Enclosed in a case. (iii) Carried in the trunk of the vehicle. (iv) Inaccessible from the interior of the vehicle. (b) A pneumatic gun that expels a metallic BB or metallic pellet greater than .177 caliber unless the pneumatic gun is unloaded and is 1 or more of the following: (i) Taken down. (ii) Enclosed in a case. (iii) Carried in the trunk of the vehicle. (iv) Inaccessible from the interior of the vehicle. (2) A person who violates this section is guilty of a misdemeanor punishable by imprisonment for not more than 90 days or a fine of not more than $100.00, or both.