"Bona fide supplier" means an established business entity engaged in the development and sale of firearms parts to one or more federal firearms manufacturers or federal firearms importers.
"Federal firearms dealer" means a licensed manufacturer pursuant to 18 U.S.C. 921(a)(11).
"Federal firearms importer" means a licensed importer pursuant to 18 U.S.C. 921(a)(9).
"Federal firearms manufacturer" means a licensed manufacturer pursuant to 18 U.S.C. 921(a)(10).
"Frame or receiver" means a part of a firearm that, when the complete weapon is assembled, is visible from the exterior and provides housing or a structure designed to hold or integrate one or more fire control components, even if pins or other attachments are required to connect those components to the housing or structure. For models of firearms in which multiple parts provide such housing or structure, the part or parts that the Director of the federal Bureau of Alcohol, Tobacco, Firearms and Explosives has determined are a frame or receiver constitute the frame or receiver. For purposes of this definition, "fire control component" means a component necessary for the firearm to initiate, complete, or continue the firing sequence, including any of the following: hammer, bolt, bolt carrier, breechblock, cylinder, trigger mechanism, firing pin, striker, or slide rails.
"Security exemplar" means an object to be fabricated at the direction of the United States Attorney General that is (1) constructed of 3.7 ounces of material type 17-4 PH stainless steel in a shape resembling a handgun and (2) suitable for testing and calibrating metal detectors.
"Three-dimensional printer" means a computer or computer-drive machine capable of producing a three-dimensional object from a digital model.
"Undetectable firearm" means (1) a firearm constructed entirely of non-metal substances; (2) a firearm that, after removal of all parts but the major components of the firearm, is not detectable by walk-through metal detectors calibrated and operated to detect the security exemplar; or (3) a firearm that includes a major component of a firearm, which, if subject to the types of detection devices commonly used at airports for security screening, would not generate an image that accurately depicts the shape of the component. "Undetectable firearm" does not include a firearm subject to the provisions of 18 U.S.C. 922(p)(3) through (6).
"Unfinished frame or receiver" means any forging, casting, printing, extrusion, machined body, or similar article that:
"Unserialized" means lacking a serial number imprinted by:
720 ILCS 5/24-5.1