Troy's new modular vertical combat grip features a lightweight polymer design, waterproof storage compartment, and aggressive ridged pattern for enhanced grip. Made from advanced proprietary polymer that is chemical, biological, and impact resistant, the CQB Vertical Grip can withstand harsh environments and rapidly changing mission conditions. Compatible with any MIL-SPEC M1913 Picatinny rail system. Patent Pending. Made in the U.S.A.