Gun rights groups have filed a federal lawsuit challenging Colorado’s ban on so-called ghost guns. Those are firearms without serial numbers that are difficult for law enforcement to trace and allow people to circumvent background checks. The challenge filed Monday is the latest of several Second Amendment lawsuits aimed at a slew of gun control laws passed last year by Colorado’s majority Democratic legislature. The lawsuit filed by the Rocky Mountain Gun Owners alleges that the ban infringes on Americans’ Second Amendment rights, pointing to a long history of citizens being their own gunsmiths. Colorado's governor was named as the defendant in the suit, but his office declined to comment, citing ongoing litigation.
