These two are pretty clear about there intentions and goals - short 2.5 minute video.
Rep. Jan Schakowsky: Assault Weapons ban 'Just the Beginning' - YouTube
Rep. Jan Schakowsky: Assault Weapons ban 'Just the Beginning' - YouTube
Yep. They know they won't get much passed right now but they're willing to wait until the time is right for more, and then at a later time, more yet again.This is the "progressive" approach- unrelenting incremental steps.