All aluminum 4.75-inch vertical forward grip with grooved grip area. XPRESS lever mount and thumb screw for quick attachment and removal Picatinny rails. Grip comes straight off so removal does not require removal of other rail mounted accessories. Very sturdy design. Length is 4.75-inches with a weight of 6.5 ounces. Grip is hollow, threaded, and capped with a rubber o-ring seal. Suitable for dry storage of batteries.