The Gas-Operated Semiautomatic Firearms Exclusion Act seeks to prohibit the importation, sale, manufacture, transfer, receipt, or possession of gas-operated semiautomatic firearms, along with large-capacity ammunition feeding devices and rapid fire devices. The act sets enforcement timelines, with prohibitions taking effect on July 1, 2025, and possession restrictions beginning January 1, 2026. Exceptions are made for certain entities, including the federal government and licensed firearms dealers, as well as for firearms manufactured lawfully before the enforcement dates. The Attorney General is tasked with maintaining a list of prohibited firearms and developing a certification system for existing gas-operated semiautomatic firearms.

The bill introduces new provisions for licensed firearm dealers, requiring them to provide certification forms for law enforcement inspection and submit these forms to the Attorney General if they cease operations. The certification must confirm legal possession of the firearm and include specific details while ensuring confidentiality. Additionally, the act establishes regulations for nonresidents transporting firearms, allowing them to do so under certain conditions and requiring certification within sixty days for those moving into the state. Violations of the act are classified as misdemeanors, with more severe penalties for felony offenses involving regulated firearms. A severability clause is included to maintain the enforceability of the act's remaining provisions if any part is found invalid.