Amends the Criminal Code of 2012. Changes the names of the offenses of unlawful use of weapons, unlawful use of weapons by felons or persons in the custody of the Department of Corrections facilities, aggravated unlawful use of a weapon, being an armed habitual criminal, unlawful use of firearm projectiles, and unlawful use of a firearm in the shape of a wireless telephone to unlawful possession of weapons, unlawful possession of weapons by felons or persons in the custody of the Department of Corrections facilities, aggravated unlawful possession of a weapon, persistent unlawful possession of a weapon, unlawful possession of firearm projectiles, and unlawful possession of a firearm in the shape of a wireless telephone. Provides that if any person before the effective date of the amendatory Act has been arrested, charged, prosecuted, convicted, or sentenced for unlawful use of weapons, unlawful use or possession of weapons by felons or persons in the custody of the Department of Corrections facilities, aggravated unlawful use of a weapon, being an armed habitual criminal, unlawful use of firearm projectiles, or unlawful use of a firearm in the shape of a wireless telephone, the changes of the names and the defendants to unlawful possession of weapons, unlawful possession of weapons by felons or persons in the custody of the Department of Corrections facilities, aggravated unlawful possession of a weapon, persistent unlawful possession of a weapon, unlawful possession of firearm projectiles, and unlawful possession of a firearm in the shape of a wireless telephone, shall retroactively be made in any criminal background records maintained by the Illinois State Police, law enforcement agencies, clerks of the circuit court, and any other State agencies providing criminal background information to the public under specified timelines. Amends various Acts to make conforming changes. Effective January 1, 2025. House Floor Amendment No. 1 Deletes reference to: 720 ILCS 5/24-11 new In the amendatory changes to the Criminal Code of 2012, deletes a provision that if any person before the effective date of the amendatory Act has been arrested, charged, prosecuted, convicted, or sentenced for various weapons offenses, the name changes to those offenses made by the amendatory Act shall retroactively be made in any criminal background records maintained by the Illinois State Police, law enforcement agencies, clerks of the circuit court, and any other State agencies providing criminal background information to the public under specified timelines. Senate Committee Amendment No. 1 Changes the name of the offense of "persistent unlawful possession of a weapon" to "unlawful possession of a firearm by a repeat felony offender".