The U.S. Supreme Court will announce this week whether it will hear a challenge to an Illinois law banning assault weapons.
Semi-automatic weapons are able to rapidly shoot a single round with one pull of the trigger. Larger capacity magazines reduce the need to reload often. The ban lists certain specific rifles including those resembling the AR-15 and AK-47 firearms.
If the court agrees to hear the case, it would cast a shadow over similar bans in seven states. But declining to take it up would boost efforts to impose such bans elsewhere, at a time of renewed interest in gun regulation after recent mass shootings.
Gun rights advocates are challenging a 2013 law passed in Highland Park, Illinois, that bans the sale, purchase, or possession of semi-automatic weapons that can hold more than 10 rounds in a single ammunition clip or magazine.