Amends the Criminal Code of 2012. Repeals amendatory provisions of the Criminal Code of 2012 added by Public Act 102-1116 making it unlawful, beginning January 1, 2024, for any person within the State to knowingly possess an assault weapon, assault weapon attachment, .50 caliber rifle, or .50 caliber cartridge, with exemptions. Repeals provisions added by Public Act 102-1116 that make it unlawful for any person within the State to knowingly manufacture, deliver, sell, purchase, or cause to be manufactured, delivered, sold, or purchased a large capacity ammunition feeding device, with specified exemptions. Repeals amendatory provisions of the Criminal Code of 2012 that prohibit the manufacture, possession, sale, or offer to sell, purchase, manufacture, import, transfer, or use any device, part, kit, tool, accessory, or combination of parts that is designed to and functions to increase the rate of fire of a semiautomatic firearm above the standard rate of fire for semiautomatic firearms that is not equipped with that device, part, or combination of parts. Repeals amendatory provisions of the Freedom of Information Act added by Public Act 102-1116 that exempt from disclosure under the Act certain information concerning assault weapons endorsements received by the Illinois State Police. Effective immediately.