Legislatures across multiple states are moving to curb or clarify access to 3D-printed ghost guns, prompting legal and political battles over how the Second Amendment applies to homemade weapons; advocates argue for gun-rights protections while opponents cite public safety concerns. [P]Lawmakers and courts are wrestling with new statutes and enforcement questions, and the fight is accelerating as technology outpaces existing law — see the outline of the state-level battles in this Fox News report.