Ghost guns are fire arms and they can be regulated under the laws that are already on the books. Gun kids contain parts for use in upgrading an already existing fire alarm in the same way you would upgrade your car with a new radio new lights new rims tires. Federal law requires manufacturers of guns to have a serial number on the main part of the gun much like you have a serial number or a Vin number on your car. The word gun kit is very misleading I would not contain a complete kit for building a weapon without a serial number. In order to make the gun complete you have to buy the main part of the gun with the serial number from a licensed firearm dealer which requires a background check. I see this proposition coming up on Countable over and over again and it is miss leading because this is covered in the federal firearm background checks that are required for every purchase of a gun in the United States. Let’s keep it simple.