NcSTAR 1913 Vertical Short Grip Black Polymer. It is made of quality reinforced polymer with storage compartment. Specifications for NcSTAR 1913 Vertical Short Grip: Manufacturer: NcSTAR Finish: Textured Material: Polymer Fabric/Material: Polymer Height: 2.75 in Features of VISM 1913 Vertical Grip Short Polymer Textured Short vertical grip with 1913 MIL-STD Picatinny side accessory rail Vertical grip mounts onto 1913 MIL-STD Picatinny rails Includes two Picatinny side clamp mounts: one plain and another with a side mounted 1913 MIL-STD Picatinny accessory rail Twist and pull to open storage compartment for batteries and cleaning kits Made of quality reinforced polymer composite Package Contents: NcSTAR 1913 Vertical Short Grip NcSTAR DLG-117: 1913 Vertical Short Grip Black Polymer