The AR-15 pistol forward grip is ergonomically designed for maximum comfort and control in your hand. This ambidextrous AR-15 vertical pistol grip has textured finger grooves and a palm swell to provide a non-slip grip surface. It is easy to install; it slides onto a Picatinny or Weaver style rail and tightens with a single steel Allen head bolt. The Grip has a storage compartment at the bottom with a sliding access door. The grip is made of high-strength polymer.