The law as written:
(c) This section applies only to a person under 18 years of age who possesses or is armed with a rifle or a shotgun if the person is in violation of s. 941.28 or is not in compliance with ss. 29.304 and 29.593.
941.28: rifle less than 16 inches.
If finding out justice was served upsets you, then you don't want justice. You are not blind or ignorant, you just live to feel anger.