The bill introduces amendments to Chapter 11-47 of the General Laws, titled "Weapons," by updating definitions and regulations related to firearms and similar devices. New definitions are added for "3D printing process," "binary trigger," "bump-fire stock," "ghost gun," "undetectable firearm," and "stun gun," with the latter being described as a battery-powered device capable of transmitting an electric charge. The definition of "firearm" is expanded to encompass a wider array of weapons and components. To accommodate these additions, the numbering of subsequent definitions is revised, such as renumbering the original definition of "sell" from (17) to (18) to insert "stun gun" as (17). The bill aims to reflect modern firearm technology and address the challenge of detecting certain firearms by standard security measures.

The bill modifies the law to regulate stun guns similarly to pistols and revolvers, requiring a license or permit to carry them and setting conditions for their transport through the state. It prohibits carrying a firearm or stun gun while involved with controlled substances and bans devices that enable semi-automatic weapons to fire automatically, such as bump-fire stocks and binary triggers. The manufacture, sale, purchase, or possession of ghost guns, undetectable firearms, and firearms made by 3D printing is also prohibited, with exceptions for licensed manufacturers. Stun guns are removed from the list of prohibited weapons and are subject to new regulations, including age restrictions and penalties for misuse. The bill would be effective upon passage, allowing individuals 18 and older with a license or permit to carry a stun gun.