1. Short title This Act may be cited as the Stop Home Manufacture of Ghost Guns Act of 2020 . 2. Prohibitions relating to firearm manufacturing machines (a) Prohibitions Section 922 of title 18, United States Code, is amended by adding at the end the following: (aa) (1) It shall be unlawful for any person, in or affecting interstate or foreign commerce, to transfer or offer to transfer to any person other than a licensed manufacturer a firearm manufacturing machine. (2) (A) Except as provided in subparagraph (B), it shall be unlawful for any person other than a licensed manufacturer, in or affecting interstate or foreign commerce, to possess or purchase a firearm manufacturing machine. (B) Subparagraph (A) shall not apply to a person who is engaged in the business of selling manufacturing equipment to a licensed manufacturer, and who possesses a firearm manufacturing machine with the intent to transfer the machine to a licensed manufacturer. . (b) Definition of firearm manufacturing machine Section 921(a) of such title is amended by adding at the end the following: (36) The term firearm manufacturing machine means— (A) a device designed or redesigned, made or remade, and intended to be used primarily to make, or convert a product into, a frame or receiver for a firearm; and (B) any combination of parts designed or intended for use in making a device described in subparagraph (A) and from which such a device may be readily assembled. . (c) Penalties Section 924 of such title is amended— (1) in subsection (a)(1)(B), by striking or (q) and inserting (q), or (aa) ; (2) in subsection (d)(1)— (A) by inserting and any firearm manufacturing machine involved in any knowing violation of section 922(aa), before shall be subject ; and (B) by striking firearms or ammunition each place it appears and inserting firearms, ammunition, or firearm manufacturing machine ; and (3) in subsection (d)(2)— (A) in subparagraph (A), by striking firearms or ammunition and inserting firearms, ammunition, and firearm manufacturing machines