This Picatinny Vertical foregrip with storage is a swat black attaches to any Picatinny handguard rail mount. The Picatinny Vertical Grip features a storage compartment in the verical foregrip with tight-sealing door for batteries and small gun cleaning accessories. The vertical grip is designed to be grasped by the supporting hand for better support and aids in the maneuverability of the firearms and weapon retchion under fire. The grip is made of a high-quality polymer. All steel mounting hardware is included.