The White House is trying to craft a series of executive actions for President Joe Biden to sign to try to limit gun violence, hoping they cannot be quickly dismantled in court, according to aides and gun safety groups.

Among the measures being considered — and strongly encouraged by activists — is one directing the U.S. Justice Department to reinterpret existing law on untraceable "ghost guns."

So-called ghost gun kits are self-assembled from parts purchased online or at gun shows and are increasingly associated with crimes. But they are not classified as firearms and so can be legally sold without serial numbers or background checks.