A. Unlawful sales of weapons to minors is the selling or otherwise delivering for value of any firearm or other instrumentality customarily used as a dangerous weapon to any person under the age of eighteen. Lack of knowledge of the minor's age shall not be a defense.
B. Whoever commits the crime of unlawful sales of weapons to minors shall be fined not more than three hundred dollars or imprisoned for not more than six months, or both.