This is a Magpul Industries Grip known as the MOE-AK+, model MAG537-BLK.
The MOE AK+ Grip combines reinforced polymer body construction with comfortable" wrap-around rubber overmolding for maximum weapon control in adverse environments. A drop-in upgrade for AK-pattern pistol grips" the MOE AK+ Grip is designed to improve ergonomics and weapon control" and borrows the rubber overmolded surface of the popular MOE+ AR15/M4 grip to ensure a positive and comfortable hold on the weapon. Compatible with Magpul Grip Cores for storage customization. Made in U.S.A. Grip counts as one US compliance part for 922(r).
Features:
Drop-in upgrade for AK47/AK74 pistol grips
Fits both milled and stamped receivers
One-piece reinforced polymer construction with rubber over molding