SECTION 1. Section 121 of chapter 140 of the General Laws, as appearing in the 2020 Official Edition, is hereby amended by inserting after the definition of “weapon” the following definitions:-

“Frame”, the part of a firearm or variant of a firearm, that provides housing or a structure for the primary energized component designed to hold back the hammer, striker, bolt, or similar element, prior to initiation of the firing sequence, even if pins or other attachments are required to attach the component to the housing or structure.

“Receiver”, the part of a rifle or shotgun, or variants thereof, 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 the component to the housing or structure.

SECTION 2. The first paragraph of section 123 of said chapter 140, as so appearing, is hereby amended by inserting after the twenty-first clause the following clause:- Twenty-second, That no licensee shall sell, lease, rent, transfer or deliver or offer for sale, lease, rent, transfer or delivery to a person a completed or unfinished frame or receiver that is not an integrated component of a fully-assembled weapon.

SECTION 3. Said section 123 of said chapter 140, as so appearing, is hereby amended by striking out, in line 286, the words “licensing authority” and inserting in place thereof the following words:- “the office of the attorney general".