The United States Supreme Court has upheld a Biden administration regulation that classifies "ghost gun" kits as firearms under federal law, allowing the Bureau of Alcohol, Tobacco, Firearms and Explosives (ATF) to regulate them. In a 7-2 decision, the court found that the ATF's regulation aligns with the federal Gun Control Act, rejecting challengers' arguments and affirming the agency's authority over certain weapon parts kits. This ruling is seen as a victory for gun control advocates, as it enhances oversight and accountability in the sale and distribution of gun parts by including ghost gun kits under the same regulatory framework as other firearms.