TROY Industries Battle Ax CQB Grip, Fits Picatinny, Lightweight Polymer Design, Waterproof Storage Compartment, and Aggressive Ridged Pattern, Black SGRI-VRT-00BT-00 This vertical grip is your solution to a forward grip that attaches to any MIL-STD Picatinny Rail without tools. Made from Troy's 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.