The Supreme Court declined to hear a case to overturn a 2013 Maryland law that outlawed various semiautomatic guns, calling them illegal "assault weapons."

Thomas said that the constitutional status of AR-15s is "all the urgent" following a recent Court decision on ghost guns. The Court ruled that the Bureau of Alcohol, Tobacco, Firearms and Explosives (ATF) is permitted to regulate some weapon parts kits and unfinished frames or receivers under the Gun Control Act.