Compiled Laws, Chapter 750. Michigan Penal Code § 750.223

Sec. 223. (1) A person who knowingly sells a firearm without complying with section 2 of 1927 PA 372, MCL 28.422, 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.

(2) A person who knowingly sells a firearm more than 26 inches in length to a person under 18 years of age is guilty of a misdemeanor punishable by imprisonment for not more than 90 days or a fine of not more than $500.00, or both. A second or subsequent violation of this subsection is a felony punishable by imprisonment for not more than 4 years or a fine of not more than $2,000.00, or both. It is an affirmative defense to a prosecution under this subsection that the person who sold the firearm asked to see and was shown a driver license or identification card issued by a state that identified the purchaser as being 18 years of age or older.

(3) A seller shall not sell a firearm or ammunition to a person if the seller knows that either of the following circumstances exists:

(4) A person who violates subsection (3) is guilty of a felony punishable by imprisonment for not more than 10 years or by a fine of not more than $5,000.00, or both.