AIM Sports Inc AR 3in Verticle Foregrip W/Battery Compartment Polymer Black Small. This vertical grip is made of polymer and mounts to any Picatinny or Weaver rail. Specifications for AIM Sports Inc AR 3in Verticle Foregrip W/Battery Compartment: Manufacturer: AIM Sports Inc Color: Black Condition: New Features of AIM Sports Inc AR 3in Verticle Foregrip W/Battery Compartment Single battery compartment Compatible with Weaver / Picatinny 1913 Rails Black Polymer finish Package Contents: AIM Sports Inc AR 3in Verticle Foregrip W/Battery Compartment AIM Sports Inc PJSVG: AR 3in Verticle Foregrip W/Battery Compartment Polymer Black Small