While the AWB is in place, the simple act of owning a collapsible/folding stock, flash hider, pistol grip, detachable magazine and any other "evil feature" item IS NOT ILLEGAL.
Putting an incorrect number of these items on a post ban receiver IS ILLEGAL. You can only have two of these items on a postban rifle under the 94 AWB legislation. You must also have the correct number of US made parts if you have two of these items on a post-1989 receivered rifle.
For example: You can take a collapsible stock and put it on a post ban rifle, and pin or weld the stock open, so that it won't close. That is legal under the 94 AWB. After the ban sunsets, remove the pin or weld and the stock will swing shut/collapse. That would be legal September 14.
I hope this helps.
Also, congress will be in session for four days (4) before the ban expires.