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 Supreme Court justices seem skeptical the government overstepped in requiring serial numbers, sales records and background checks for ghost guns.

The U.S. Supreme Court signaled on Tuesday a willingness to uphold the legality of a 2022 regulation issued by President Joe Biden's administration cracking down on "ghost guns," largely untraceable firearms whose use has proliferated in crimes nationwide.