The Supreme Court ruling affects ghost guns, the largely untraceable firearms used in a growing number of crimes over the past decade.

The Supreme Court on Wednesday upheld Biden-era federal regulations on “ghost guns,” mail-order kits that allow people to build untraceable weapons at home – handing gun control groups a rare win at the conservative high court.

Gun safety groups are celebrating the Supreme Court decision upholding a Biden administration firearm regulation on nearly impossible-to-trace ghost guns.