The AK featureless grip with thumb rest is designed for firearms that use AK pistol grips for featureless builds like California and NY. The fin grip with thumb rest feature is for a more secure grip and better control of the AK firearm. This featureless grip comes with, AK pistol grip screw and nut mounting tool. This Non-pistol grip right-handed design with rear blade fin behind main body is to prevents the user's thumb from wrapping around the grip main body. Rear blade fin is on the center line of the grip. Grip is black polymer construction with textured grip. Please consult your local laws and regulations to ensure compliance.