This is a Ergo Grip Grip, model 4092-BK.
The ERGO MSR AR-15 Pistol Grip is a drop in upgrade for your AR-15 rifle. The MSR" or Modern Sporting Rifle" grip is a significant improvement over the A2 style grip. Its shape and texture provide better control and comfort. The MSR grip comes with all the hardware needed to mount the grip.
Features:
MSR Upgraded Pistol Grip
Aggressive Texturing
Integral rear upper extension supports the web of the shooters hand
Mounting hardware included
