Repeals the provisions of Public Act 102-1116 that make amendatory changes to the Firearms Restraining Order Act that provide that a petitioner for a firearms restraining order may request a plenary firearms restraining order of up to one-year, but not less than 6 months (restores the 6 months provision). Repeals provisions that the firearms restraining order may be renewed for an additional period of up to one year. Repeals amendatory provisions of the Criminal Code of 2012 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 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 that exempt from disclosure under the Act certain information concerning assault weapons endorsements received by the Illinois State Police. Effective immediately.