Virginia HB 1691 - Undetectable Firearms

It shall be unlawful for any person to manufacture, import, sell, transfer, or possess ... any firearm that after removal of all parts other than a major component is not detectable as a firearm by the types of detection devices, including X-ray machines, commonly used at airports for security screening.

”Major component” means (i) the slide or cylinder, or the frame or receiver, of the firearm and (ii) in the case of a rifle or shotgun, the barrel of the firearm.