This polymer and rubber vertical forward grip puts the user in a comfortable fighting stance. It incorporates a no-tool screw cap storage compartment, and rubberized front and back panels for comfortable non-slip grip surface. This short, vertical grip also has dual removable pressure switch mounts. The captive thumbnut can't be lost and provides quick and easy installation to Picatinny rail, no tools required. It measures 2.125" L x 1.75" W x 4.125" H and weighs 3.2 oz.