The law is retarded. Cars and motorcycles require mufflers because without them, the explosions from combustion engines are far too loud. But even with them on, you can clearly still hear them from distance. It would be no different with suppressors save for maybe subsonic bolt action. Secondly, where is the concern coming from? How many instances have there been with crime/shootings happening with suppressors in other states that allow them? Third, the typical gang style shootings that are most common are not going to involve suppressors out of the sheer cost, paperwork hassle, and the fact that most of those shooters are illegally acquiring guns in the first place. There is no reason to disallow them in MA. If anything, they could even improve neighbor relations at gun ranges. But I suppose I'm preaching to the choir here.