firearms but circumvent the manufacturers’ serial number requirement. (7) Address the current loophole allowing the serial number exemption for the so-called 80 percent receiver, , which is the central component that houses the firing mechanism of the weapon and which, by leaving the manufacturer as an unfinished product, allows the serial number requirement to be circumvented, because a purchaser may adapt 80 percent receivers into a final product in a relatively uncomplicated fashion. (c) Hearings, etc The task force may hold public hearings and engage stakeholders to better understand the scope of the benefits, threats, and challenges of 3–D printer technology. (d) Report to Congress Within 6 months after the date of the enactment of this Act, the task force shall submit to the Congress a report on its findings. 3. Prohibitions on using 3–D printing technology to make a firearm or ammunition, and on possessing or transferring a firearm or ammunition so made (a) In general Section 922 of title 18, United States Code, is amended by adding at the end the following: (aa) It shall be unlawful for any person, in or affecting interstate or foreign commerce, to— (1) make a firearm, ammunition, or a component of a firearm or ammunition by use of a device that can produce a 3-dimensional copy of an object