CAA's Ergonomic vertical grip has checkered finger grooves and a rubberized backstrap. It puts the user in a comfortable fighting stance with controlled operation and comfortable carry. It has a skeletonized design to reduce weight and incorporates a no-tool screw cap storage compartment. It includes a rail lug to prevent any movement, and a captive thumbnut (so it can't be lost), to provides quick and easy installation to Picatinny rail without tools. It measures 2.175" L x 1.375" W x 4.75" H and weighs 3.84 oz.