By the end of the oral arguments, it appeared that a rule the Biden administration issued two years ago cracking down on the sale of often-untraceable gun kits on the internet would likely get enough votes from the justices to survive a challenge from makers of the products.

A majority of justices seemed skeptical of arguments that the Biden administration exceeded its authority in imposing restrictions on ghost guns.

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.