Here's a pic of the hand position with a fin and a AK thumb grip. By keeping your thumb from grasping around like a pistol grip I would think this would qualify as a non pistol grip. A thordsen if cut off would result in pistol grip.
Would this AK with a strike industries AK simple grip fin be legal in NY? I'm manufacturing AK thumb grips for California AK's already and was wondering if this setup would be legal in NY. I've seen NY AK's using the spur grip, but not sure about the strike industries AK simple grip. Any help...