`(L) A semiautomatic rifle or shotgun originally designed for military or law enforcement use, or a firearm based on the design of such a firearm, that is not particularly suitable for sporting purposes, as determined by the Attorney General. In making the determination, there shall be a rebuttable presumption that a firearm procured for use by the United States military or any Federal law enforcement agency is not particularly suitable for sporting purposes, and a firearm shall not be determined to be particularly suitable for sporting purposes solely because the firearm is suitable for use in a sporting event.'.
(b) Related Definitions- Section 921(a) of such title is amended by adding at the end the following:
`(36) Barrel Shroud- The term `barrel shroud' means a shroud that is attached to, or partially or completely encircles, the barrel of a firearm so that the shroud protects the user of the firearm from heat generated by the barrel, but does not include a slide that encloses the barrel, and does not include an extension of the stock along the bottom of the barrel which does not encircle or substantially encircle the barrel.
`(37) Conversion Kit- The term `conversion kit' means any part or combination of parts designed and intended for use in converting a firearm into a semiautomatic assault weapon, and any combination of parts from which a semiautomatic assault weapon can be assembled if the parts are in the possession or under the control of a person.
`(38] Detachable Magazine- The term `detachable magazine' means an ammunition feeding device that can readily be inserted into a firearm.
`(39) Fixed Magazine- The term `fixed magazine' means an ammunition feeding device contained in, or permanently attached to, a firearm.
`(40) Folding or Telescoping Stock- The term `folding or telescoping stock' means a stock that folds, telescopes, or otherwise operates to reduce the length, size, or any other dimension, or otherwise enhances the concealability, of a firearm.
`(41) Forward Grip- The term `forward grip' means a grip located forward of the trigger that functions as a pistol grip.
`(42) Pistol Grip- The term `pistol grip' means a grip, a thumbhole stock, or any other characteristic that can function as a grip.
`(43) Threaded Barrel- The term `threaded barrel' means a feature or characteristic that is designed in such a manner to allow for the attachment of a firearm as defined in section 5845(a) of the National Firearms Act (26 U.S.C. 5845(a)).'.
SEC. 4. GRANDFATHER PROVISION.
Section 922(v)(2) of title 18, United States Code, as added by section 2(a) of this Act, is amended--
(1) by inserting `(A)' after `(2)'; and
(2) by adding after and below the end the following:
`(B) Paragraph (1) shall not apply to any firearm the possession or transfer of which would (but for this subparagraph) be unlawful by reason of this subsection, and which is otherwise lawfully possessed on the date of the enactment of this subparagraph.'.
SEC. 5. REPEAL OF CERTAIN EXEMPTIONS.
Section 922(v)(3) of title 18, United States Code, as added by section 2(a) of this Act, is amended by striking `(3)' and all that follows through the 1st sentence and inserting the following:
`(3) Paragraph (1) shall not apply to any firearm that--
`(A) is manually operated by bolt, pump, level, or slide action;
`(B) has been rendered permanently inoperable; or
`(C) is an antique firearm.'.
SEC. 6. REQUIRING BACKGROUND CHECKS FOR THE TRANSFER OF LAWFULLY POSSESSED SEMIAUTOMATIC ASSAULT WEAPONS.
Section 922(v) of title 18, United States Code, as added by section 2(a) of this Act, is amended by adding at the end the following:
`(5) It shall be unlawful for any person to transfer a semiautomatic assault weapon to which paragraph (1) does not apply, except through--
`(A) a licensed dealer, and for purposes of subsection (t) in the case of such a transfer, the weapon shall be considered to be transferred from the business inventory of the licensed dealer and the dealer shall be considered to be the transferor; or
`(B) a State or local law enforcement agency if the transfer is made in accordance with the procedures provided for in subsection (t) of this section and section 923(g).
`(6) The Attorney General shall establish and maintain, in a timely manner, a record of the make, model, and date of manufacture of any semiautomatic assault weapon which the Attorney General is made aware has been used in relation to a crime under Federal or State law, and the nature and circumstances of the crime involved, including the outcome of relevant criminal investigations and proceedings. The Attorney General shall annually submit the record to the Congress and make the record available to the general public.'.
SEC. 7. STRENGTHENING THE BAN ON THE POSSESSION OR TRANSFER OF A LARGE CAPACITY AMMUNITION FEEDING DEVICE.
(a) Ban on Transfer of Semiautomatic Assault Weapon With Large Capacity Ammunition Feeding Device-
(1) IN GENERAL- Section 922 of title 18, United States Code, is amended by inserting after subsection

the following:
`(z) It shall be unlawful for any person to transfer any assault weapon with a large capacity ammunition feeding device.'.
(2) PENALTIES- Section 924(a) of such title is amended by adding at the end the following:
`(8] Whoever knowingly violates section 922(z) shall be fined under this title, imprisoned not more than 10 years, or both.'.
(b) Certification Requirement-
(1) IN GENERAL- Section 922(w) of such title, as added by section 2(a) of this Act, is amended--
(A) in paragraph (3)--
(i) by adding `or' at the end of subparagraph (B); and
(ii) by striking subparagraph (C) and redesignating subparagraph (D) as subparagraph (C); and
(B) by striking paragraph (4) and inserting the following:
`(4) It shall be unlawful for a licensed manufacturer, licensed importer, or licensed dealer who transfers a large capacity ammunition feeding device that was manufactured on or before the date of the enactment of this subsection, to fail to certify to the Attorney General before the end of the 60-day period that begins with the date of the transfer, in accordance with regulations prescribed by the Attorney General, that the device was manufactured on or before the date of the enactment of this subsection.'.
(2) PENALTIES- Section 924(a) of such title, as amended by subsection (a)(2) of this section, is amended by adding at the end the following:
`(9) Whoever knowingly violates section 922(w)(4) shall be fined under this title, imprisoned not more than 5 years, or both.'.
SEC. 8. UNLAWFUL WEAPONS TRANSFERS TO JUVENILES.
Section 922(x) of title 18, United States Code, is amended--
(1) in paragraph (1)--
(A) in subparagraph (B), by striking the period and inserting a semicolon; and
(B) by adding at the end the following:
`(C) a semiautomatic assault weapon; or
`(D) a large capacity ammunition feeding device.'; and
(2) in paragraph (2)--
(A) in subparagraph (B), by striking the period and inserting a semicolon; and
(B) by adding at the end the following:
`(C) a semiautomatic assault weapon; or
`(D) a large capacity ammunition feeding device.'.
SEC. 9. BAN ON IMPORTATION OF LARGE CAPACITY AMMUNITION FEEDING DEVICE.
(a) In General- Section 922(w) of title 18, United States Code, as added by section 2(a) of this Act, is amended--
(1) in paragraph (1), by striking `(1) Except as provided in paragraph (2)' and inserting `(1)(A) Except as provided in subparagraph (B)';
(2) in paragraph (2), by striking `(2) Paragraph (1)' and inserting `(B) Subparagraph (A)'; and
(3) by inserting before paragraph (3) the following:
`(2) It shall be unlawful for any person to import or bring into the United States a large capacity ammunition feeding device.'.
(b) Conforming Amendment- Section 921(a)(31)(A) of such title, as added by section 2(a) of this Act, is amended by striking `manufactured after the date of enactment of the Violent Crime Control and Law Enforcement Act of 1994'.