; and (ii) by striking or (D) any destructive device and inserting ; (D) any destructive device; or (E) any combination of parts designed or intended for use in converting any device into a firearm and from which a firearm may be readily assembled ; (B) in paragraph (10), by adding at the end the following: The term manufacturing firearms includes assembling a functional firearm or molding, machining, or 3D printing a frame or receiver, and does not include making or fitting special barrels, stocks, or trigger mechanisms to firearms. ; and (C) by adding at the end the following: (54) The term frame or receiver — (A) means the part of a weapon that can provide the action or housing for the hammer, bolt, or breechblock and firing mechanism; (B) includes a frame or receiver blank, casting, or machined body that requires further machining or molding to be used as part of a functional firearm, and which is designed and intended to be used in the assembly of a functional firearm, unless the piece of material has had— (i) its size or external shape altered solely to facilitate transportation or storage; or (ii) solely its chemical composition altered. (55) The term ghost gun — (A) means a firearm, including a frame or receiver, that lacks a unique serial number engraved or cast in metal or metal alloy on the frame or receiver by a licensed manufacturer or importer in accordance with this chapter; and (B) does not include— (i) a firearm that has been rendered permanently inoperable; (ii) a firearm identified by means of a unique serial number assigned by a State agency and engraved or cast on the receiver or frame of the weapon before the effective date of the Gun Violence Prevention and Community Safety Act of 2023 in accordance with a State law; (iii) a firearm manufactured or imported before December 16, 1968; or (iv) a firearm identified as provided for under section 5842 of the Internal Revenue Code of 1986. . (2) Prohibitions