VISM Picatinny Hard Vertical Grip Black. Storage compartment with tight-sealing door for batteries and cleaning supplies.Designed to be grasped by the support hand for better support and pointability.Aids in the maneuverability of the firearms. Made of high quality polymer. Specifications for VISM Picatinny Hard Vertical Grip: Manufacturer: VISM Color: Black Mount: Picatinny Package Contents: VISM Picatinny Hard Vertical Grip VISM VG163: Picatinny Hard Vertical Grip Black