; (E) a blowback-operated system that directly utilizes the expanding gases of the ignited propellant powder acting on the cartridge case to drive the breechblock or breech bolt rearward; or (F) a recoil-operated system that utilizes the recoil force to unlock the breech bolt and then to complete the cycle of extracting, ejecting, and reloading. (41) The term large capacity ammunition feeding device — (A) means a magazine, belt, drum, feed strip, helical feeding device, or similar device, including any such device joined or coupled with another in any manner, that— (i) has an overall capacity of, or that can be readily restored, altered, or converted to accept, more than 10 rounds of ammunition; and (ii) is not permanently fixed; and (B) does not include any device designed to accept, and capable of operating only with, .22 or less caliber rimfire ammunition. . (b) Prohibitions Section 922 of title 18, United States Code, is amended— (1) by inserting after subsection (u) the following: (v) (1) Except as provided in paragraph (2) or (4), it shall be unlawful for any person to import, sell, manufacture, transfer, receive, or possess, in or affecting interstate or foreign commerce, a firearm, device, or combination of parts described in subparagraphs (A) through (H), knowing or having reasonable cause to believe that— (A) the firearm is included on the list of prohibited gas-operated semi-automatic firearms described in section 935(a); (B) the modified non-prohibited firearm, as modified, operates as a firearm included on the list of prohibited gas-operated semi-automatic firearms described in section 935(a); (C) the combination of parts is designed and functions to modify an otherwise non-prohibited firearm so that the firearm, as modified, operates as a gas-operated semi-automatic firearm included on the list of prohibited gas-operated semi-automatic firearms described in section 935(a)