If the owner follows the procedures to register the “ghost” gun with the California Department of Justice (DOJ), owning self-assembled or other privately constructed firearms, also referred to as “ghost” guns, is legal in the state of California. In 2018, laws mandating the registration of certain firearms were passed. Until that point, it was lawful to possess firearms of this kind. Attorneys that focus on gun criminal defense can assist in navigating these intricate legal regulations.