Sure, no precedent of moving the confiscatory goalposts ever is there.  Recall the GCA 1968, the "saturday night special" ban?  How'd that work?  And you appear to have an all knowing attitude about where to draw the line on what should be banned.  How about my 10/22?  My BAR?  Is my high capacity lever action or semi auto shotgun next?  And really, what you advocate would limit what exactly?-you would presumably feel better if there were only 25 dead say?  Putting a GC bandaid on the sicko human condition does nothing to address the real problem, in this case the predictable homegrown radical islamic terrorist.