; and (ii) in the third sentence, by striking , or any licensed importer or manufacturer of ammunition, and inserting , or any licensed importer, manufacturer, or dealer of ammunition, ; (B) in paragraph (2)— (i) by inserting or ammunition after disposition of firearms ; and (ii) by inserting or ammunition after a firearm ; (C) in paragraph (3), by adding at the end the following: (C) (i) Each licensee shall prepare a report of multiple sales or other dispositions whenever the licensee sells or otherwise disposes of, at one time or during any 5 consecutive business days, a large quantity of ammunition (as determined in accordance with clause (ii)) to an unlicensed person. The report shall be prepared on a form specified by the Attorney General and forwarded to the office specified thereon and to the department of State police or State law enforcement agency of the State and, where feasible, the local law enforcement agency of the local jurisdiction in which the sale or other disposition took place, not later than the close of business on the day that the multiple sales or other disposition occurs. (ii) The Attorney General shall determine the quantity of ammunition that constitutes a large quantity for the purpose of this subparagraph, the quantity of which— (I) shall be based on the determination by the Attorney General of the quantity that indicates an intent to engage in any type of criminal activity; (II) may be modified by the Attorney General from time to time; and (III) may vary by geographic area if the Attorney General determines that it is appropriate to assist law enforcement efforts. ; (D) in paragraph (6)— (i) by inserting or a significant quantity of ammunition, after theft or loss of a firearm ; and (ii) by adding at the end the following: Not later than 60 days after the date of enactment of the Ammunition Background Check Act of 2018 , the Attorney General shall promulgate rules defining significant quantity for the purpose of this paragraph.