Folding stock OK AFTER sunset
I think the question was "what's ok after the sunset of the AW Ban?"
ANY of the proscribed features (flash hider, folding stock, pistol grip, etc etc) are ok AFTER and ONLY AFTER the AW ban has "sunsetted" and is dead.
The key is TWO features... i.e.
"IF it has a detachable magazine, and more than one other feature (folding stock, pistol grip, flash hider, etc) then it is an 'assault weapon' and thus banned from NEW manufacture."
The AW Ban does not cover IMPORTS. These were banned previously and will not change if the AW Ban sunsets. In other words, IF (God willing) the AW ban sunsets, you'll be able to buy a rifle from Bushmaster/DPMS but not from SIG or Norinco.