Illinois will soon outlaw advertising for firearms that officials determine produces a public safety threat or appeals to children, militants or others who might later use the weapons illegally, as the state continues its quest to curb mass shootings.

Gun-rights advocates say the plan, which Democratic Gov. J.B. Pritzker has pledged to sign into law, is an unreasonably vague decree that violates not only the constitutionally protected right to own guns but also free speech.

The prime exhibit in Democratic Attorney General Kwame Raoul’s effort is the JR-15, a smaller, lighter version of the AR-15 semi-automatic rifle advertised with the tag line, “Get ’em One Like Yours.” The maker says it is deliberately made smaller, with added safety features, to fit younger shooters as they learn from adults how to safely maneuver such a weapon. Raoul says it’s marketed to children and potentially entices them to skip the adult supervision and start firing.