- Mounts to MilSpec 1913 Picatinny RIS - Made from high-density polymer - Lightweight build - Dual cross-bolt locking mechanisms - Optimized for thumb break shooting method - Deep stippling and non-slip grooves for secure grip - Includes mounting hardware and universal mounting rail for custom fitting to factory hand guards In the Box Magpul RVG Rail Vertical Grip installation instructions (inside sleeve) Specifications: Build Full polymerLength 1.875 in.Height 3.5 in.Width 1.375 in.Weight 3.2 oz.Colors BLACK, DARK EARTH, GRAY, OD GREEN California Proposition 65 Warning: Cancer and Reproductive Harm - www.P65Warnings.ca.gov