I saw something interesting a few days ago:

guy showed up with a bright pink suppressor a friend had 3-D printed, and wanted to try it out.  

It worked quite well.  Unless it was some really interesting plastic it probably won't last long, but if you stuck with subsonic ammo, might last a fair while.  And then?  Print a new one.

This brings us to the idea of "You're going to ban this?  Really."  The idiots are trying to ban 3-D printers that don't have "We don't like this so don't make it" software, and it won't work.

Interesting times.