The Gas-Operated Semiautomatic Firearms Exclusion Act establishes a comprehensive prohibition on the importation, sale, manufacture, transfer, receipt, or possession of gas-operated semiautomatic firearms, large-capacity ammunition feeding devices, and rapid-fire devices, effective July 1, 2025. The bill mandates the Attorney General to maintain a list of prohibited firearms and implement a certification system for semiautomatic firearms. Exceptions are made for certain government entities, licensed dealers, and firearms manufactured prior to the enforcement date, provided they are certified by the owner. The legislation also defines key terms and outlines penalties for violations, which can include felony charges, thereby enhancing public safety by regulating firearms and ammunition deemed high-risk.

Additionally, the bill introduces specific provisions for nonresidents possessing gas-operated semiautomatic firearms, requiring them to submit a certification within sixty days of moving into the state. This certification must include personal information and details about the firearm, along with a warning regarding the consequences of providing false information. Nonresidents are allowed to transport firearms for lawful purposes under certain conditions, ensuring that the firearms are unloaded and not easily accessible. The bill classifies most violations as misdemeanors, with more serious offenses resulting in fourth-degree felonies, and includes a severability clause to maintain the enforceability of remaining provisions if any part of the act is invalidated.