This is a TROY Grip known as the Battle Ax CQB, model SGRI-VRT-00BT-00.
This front grip is your solution to a front grip that attaches to any MIL-STD Picatinny Rail without tools. Made from Troy proprietary military-grade" chemical" biological and impact resistant polymer" the CQB Vertical Grip will not heat up during rapid fire or full auto fire. A waterproof storage compartment and aggressive ridged pattern for an enhanced grip rounds out this lightweight option for a vertical grip.
Features:
Black finish
Fits Picatinny
Battle Ax CQB grip
Waterproof storage compartment
Aggressive ridged pattern