Yes. Many rifles, shotguns, and pistols are not copies or duplicates of enumerated Assault Weapons. For example, the following are not copies or duplicates under G.L. c. 140, § 121:
Any handgun on the August 2016 version of the state’s Approved Firearms Roster, available here.
Handguns are still subject to MA 940 CMR 16.00 et seq Consumer Protection Regulations;
Any .17 or .22 caliber rimfire rifle;
Any Ruger Mini 14 or substantially similar model weapon;
Beretta Cx4 Storm
FN PS90 or substantially similar model weapon;
IWI Tavor or substantially similar model weapon;
Kel-Tec Sub-2000
Kel-Tec RFB
Any Springfield Armory M1A or substantially similar model weapon;
Any of the hundreds of rifles and shotguns on this list —Appendix A to 18 U.S.C. § 922, as appearing on September 13, 1994;
Any weapon that is operated by manual bolt, pump, lever, or slide action;
Any weapon that is an antique, relic, or theatrical prop;
Any semiautomatic rifle that cannot accept a detachable magazine that holds more than five rounds of ammunition;
Any semiautomatic shotgun that cannot hold more than five rounds of ammunition in a fixed or detachable magazine.
This list is not exhaustive; it is meant for illustrative purposes only. Many other weapons are not Assault Weapons or copies or duplicates of Assault Weapons.