Okay, let's for arguments' sake say that the optomists are correct and you can legally buy a reciever for an assault weapon that is not on the current CA DOJ list; you simply cannot have it assembled into an "assault weapon" configuration. Once the DOJ is aware this is happening, they add the new model to the List; they must by law allow owners of said recievers 90 days to register them. These "new" assault rifles then fall under SB23 and as such may be "eviled" up with pistol grips and detachable magazines, since as an assault rifle they are already "evil" by nature. This is what is being put forward here, right?
If this is true, then ANY "new" assault rifle that came out after the Ban could be legally sold in the state in the form of a stripped reciever. That would mean FN 2000s and P-90's or even the SCAR, SIG 55X, .308 ARs, whatever you can name, could be slipped in under the radar. Any you can be assured you have not just bought an expensive paperweight. This is the bottom line if the above argument is correct.