In the ghost gun case, the Supreme Court sided with the Biden administration last year, allowing the regulation to go into effect by a 5-4 vote. Chief Justice John Roberts and Justice Amy Coney Barrett joined with the court’s three liberal members to form the majority.

Supreme Court justices will hear arguments about whether federal law regulating firearms can apply to kits for making untraceable weapons at home.

Gun rights groups challenging the rules for easy-to-assembly weapons kits say a change in the law is needed to require background checks and serial numbers.