A minor under 18 years of age may not possess a dangerous weapon unless he or she has the permission of parent or guardian to have the weapon, or is accompanied by a parent or guardian while the weapon in his or her possession. Violation of this law is a class B misdemeanor upon the first offense, and a class A misdemeanor for each subsequent offense.Under state law, it is illegal for person under the age of 18 (minors) to possess handguns. Violation of this law is a class B misdemeanor upon the first offense, and a class A misdemeanor for each subsequent offense.A minor in possession of an automatic firearm, sawed off shotgun, or sawed off rifle is guilty of a third degree felony under state law.Unlawfully providing a handgun to a minor is a class B misdemeanor for the first offense, and a class A misdemeanor for the second and subsequent offenses.Selling a firearm to a minor under 18 years of age unless the minor is accompanied by a parent or guardian is illegal and a third degree felony under Utah state law"