1. Short title This Act may be cited as the Keeping Guns From Criminals Act . 2. Prohibition on sale or other disposition of a firearm to a prohibited person made into a strict liability crime with affirmative defenses (a) In general Section 922(d) of title 18, United States Code, is amended— (1) in the 1st sentence— (A) in the matter preceding paragraph (1), by striking any person knowing or having reasonable cause to believe that such person and inserting another person who ; (B) in each of paragraphs (5) and (7), by striking who, ; and (C) in paragraph (6), by striking who ; and (2) by adding at the end the following: It shall be an affirmative defense to a prosecution under this subsection that the defendant can prove by a preponderance of the evidence that, at the time of the sale or other disposition of the firearm, the National Instant Criminal Background Check System established under section 103 of the Brady Handgun Violence Prevention Act had indicated to any person that a sale or other disposition of a firearm to the recipient would not be unlawful, or the recipient possessed a valid permit, issued to the recipient by the State in which the sale or other disposition occurred, which authorizes the carrying of a concealed weapon, unless the defendant knew or had reasonable cause to believe that this subsection prohibited the sale or disposition of a firearm or ammunition to the recipient or that subsection (g) prohibited the recipient from receiving a firearm or ammunition which has been shipped or transported in interstate or foreign commerce. . (b) Conforming amendments Section 924(a)(2) of such title is amended— (1) by striking (d), ; and (2) by inserting , or violates subsection (d), before of section 922 . 3. Effective date The amendments made by this Act shall apply to conduct engaged in after the 90-day period that begins with the date of the enactment of this Act.