The bill introduces a new chapter, Chapter 47.2, to Title 11 of the General Laws, titled "Unlawful Sale of Prohibited Firearms." It establishes definitions for various terms related to firearms, including "prohibited firearm," which encompasses specific types of semi-automatic shotguns, rifles, and pistols that exceed certain magazine capacities or possess certain features, such as folding or telescoping stocks, grenade launchers, and threaded barrels.

The bill outlines restrictions on the manufacture, sale, and purchase of these prohibited firearms, making it illegal for individuals to engage in such activities. Violators may face penalties of imprisonment for up to ten years or fines of up to $10,000, and the prohibited firearms involved are subject to forfeiture.

Limited exceptions to these restrictions are provided, allowing individuals who lawfully possess a prohibited firearm to sell or transfer it to a federally licensed firearm dealer or to an individual outside the state who may lawfully possess such a weapon. Additionally, federally licensed firearm dealers may sell or transfer prohibited firearms to other federally licensed dealers, law enforcement entities, or individuals outside the state. Law enforcement agencies are also permitted to import or purchase prohibited firearms and may transfer them under specified conditions.

The bill includes a severability clause, ensuring that if any provision is found invalid, the remaining provisions will still be enforceable. The act is set to take effect on July 1, 2026.