From
https://malegislature.gov/Laws/GeneralLaws/PartI/TitleXX/Chapter140/Section121
Assault weapon'', shall have the same meaning as a semiautomatic assault
weapon as defined in the federal Public Safety and Recreational
Firearms Use Protection Act, 18 U.S.C. section 921(a)(30) as appearing
in such section on September 13, 1994, and shall include, but not be
limited to, any of the weapons, or copies or duplicates of the weapons,
of any caliber, known as: (i) Avtomat Kalashnikov (AK) (all models);
(ii) Action Arms Israeli Military Industries UZI and Galil; (iii)
Beretta Ar70 (SC?70); (iv) Colt AR?15; (v) Fabrique National FN/FAL,
FN/LAR and FNC; (vi) SWD M?10, M?11, M?11/9 and M?12; (vi) Steyr AUG;
(vii) INTRATEC TEC?9, TEC?DC9 and TEC?22; and (viii) revolving cylinder
shotguns, such as, or similar to, the Street Sweeper and Striker 12;
provided, however, that the term assault weapon shall not include: (i)
any of the weapons, or replicas or duplicates of such weapons, specified
in appendix A to 18 U.S.C. section 922 as appearing in such appendix on
September 13, 1994, as such weapons were manufactured on October 1,
1993; (ii) any weapon that is operated by manual bolt, pump, lever or
slide action; (iii) any weapon that has been rendered permanently
inoperable or otherwise rendered permanently unable to be designated a
semiautomatic assault weapon; (iv) any weapon that was manufactured
prior to the year 1899; (v) any weapon that is an antique or relic,
theatrical prop or other weapon that is not capable of firing a
projectile and which is not intended for use as a functional weapon and
cannot be readily modified through a combination of available parts into
an operable assault weapon; (vi) any semiautomatic rifle that cannot
accept a detachable magazine that holds more than five rounds of
ammunition; or (vii) any semiautomatic shotgun that cannot hold more
than five rounds of ammunition in a fixed or detachable magazine.
She is could be technically right. The court at some point is going to have define a "COPY". A Smith and Wesson MP15 Sportser doesn't (or didn't last I knew) a forward assist so it is different from a colt ar15. But I does share the other parts like lower and barrel.