The purpose of the Preventing Illegal Weapons Trafficking Act of 2025 is to tackle the illegal importation and spread of devices that can convert regular firearms into machineguns. The goal is to enhance public safety by preventing these dangerous devices from entering the country and being used in crimes. Key provisions of the law include the requirement for federal agencies, such as the Attorney General and the Department of Homeland Security, to create a comprehensive strategy within 120 days of the law's enactment.