There are alot of reports, but they don't get national attention because they're borderline innocent or just not innocent at all. Local new, however, reports on them. If only briefly.
That being said, its about optics. Banning the guns that make national news makes gun violence seem less (if it does lessen it) and thus, less of an issue to be fixed. Which means it's fixed (to the general population). The rest?
Out of sight, out of mind.