Chapter 135 of the cts of 2024 – Frames & Receivers

Pistol Frame Sales Advisory - May 15, 2025

Things you need to know:

• All frames and/or receivers (unfinished or otherwise) that could be considered a copy or duplicate of an enumerated Assault Weapon must have been lawfully possessed and registered in Massachusetts on or before July 20, 2016.
• All frames and/or receivers (unfinished or otherwise) must be registered within seven days of possession. This includes retailers.
• Any frames or receivers (unfinished or otherwise), not on the enumerated ban list, but meet the new features test must be possessed and registered in Massachusetts on or before August 1, 2024.
• Private builds for any firearm that would fall under the new semi-automatic Assault Style Firearm definitions are prohibited after August 1, 2024

Chapter 140, Section 121:

“Antique firearm”, any firearm or replica thereof manufactured in or prior to the year 1899 if such firearm: (i) is not designed or redesigned for using rimfire or conventional centerfire fixed ammunition; or (ii) uses rimfire or conventional centerfire fixed ammunition that is no longer manufactured in the United States and which is not readily available in the ordinary channels of commercial trade; provided, that “antique firearm” shall include any muzzle loading rifle, shotgun or pistol that is designed to use black powder, or a black powder substitute, and that cannot use fixed ammunition, unless the firearm: (a) incorporates a firearm frame or receiver; (b) is converted into a muzzle loading firearm; or (c) is a muzzle loading firearm that can be readily converted to fire fixed ammunition by replacing the barrel, bolt, breechblock, or any combination thereof.

“Firearm”, a stun gun, pistol, revolver, rifle, shotgun, sawed-off shotgun, large capacity firearm, assault-style firearm and machine gun, loaded or unloaded, which is designed to or may readily be converted to expel a shot or bullet; the frame or receiver of any such firearm or the unfinished frame or receiver of any such firearm; provided, however, that “firearm” shall not include any antique firearm or permanently inoperable firearm.

“Frame”, the part of a pistol or revolver that provides housing or a structure for the component designed to hold back the hammer, striker, bolt or similar primary energized component prior to initiation of the firing sequence, even if pins or other attachments are required to connect such component to the housing or structure. Any such part that is identified with an importer or manufacturer serial number shall be presumed, absent an official determination by the Bureau of Alcohol, Tobacco, Firearms and Explosives in the United States Department of Justice or other reliable evidence to the contrary, to be the frame of the firearm.

“Privately made firearm”, a firearm manufactured or assembled by an individual who is not a licensed manufacturer; provided, however, that “privately made firearm” shall not include firearms manufactured or assembled by persons licensed under section 122 in the course of their business activities.

“Receiver”, the part of a rifle or shotgun that provides housing or a structure for the primary component designed to block or seal the breech prior to initiation of the firing sequence, even if pins or other attachments are required to connect such component to the housing or structure. Any such part that is identified with an importer or manufacturer serial number shall be presumed, absent an official determination by the Bureau of Alcohol, Tobacco, Firearms and Explosives in the United States Department of Justice or other reliable evidence to the contrary, to be the receiver of the firearm.

“Unfinished frame or receiver”, a forging, casting, printing, extrusion, machined body or similar item that: (i) has reached a stage in manufacture when it may readily be completed or assembled to function as a frame or receiver; or (ii) is marketed or sold to the public to become or be used as the frame or receiver of a functional firearm once completed or assembled; provided, however, that “unfinished frame or receiver” shall not include a component designed and intended for use in an antique firearm.