You can't have a pistol grip but I'll bet it's not legal to cut the pistol grip off either is it?
Theoretically, here, if you had a pistol grip before the assault weapons registration law was passed then it must forever more have a pistol grip.
It's your typical catch-22. You can't have it but you can't remove it. It's illegal to modify an assault weapon to make it not an assault weapon.
All you can legally do is register it as an assault weapon, so later on they can come and take it away on some ex post facto charge.
No such law in the safe act. Removing the pistol grip makes it legal again.