The proposed gun ban is now officially Article 34 on the town meeting warrant. If you follow the link, you will see that the text of the article is a very general and high-level summary. The precise language of the ban, including all the technical details, will be submitted in the form of a motion prior to the annual town meeting.
While we don’t yet have this language, we have repeatedly been told it will closely follow the Highland Park, IL ban. Highland Park seems an odd choice for a model, however, given that Massachusetts, unlike Illinois, already has a statewide ban on both “assault weapons” and high-capacity magazines.