Kopfjager Reaper Grip Upper Assembly Picatinny Black. The Reaper Rail Upper Assembly mounts rifles with Picatinny rails to medium and heavy-duty tripods with 3/8-16 threaded studs and on tripods with an Arca Swiss mount. This patent-pending innovation eliminates the need for slight adjustments to the tripod if it is not leveled. Easily remove magazines with ease due to the Reaper Rails offset design. The 11 degrees of rifle cant (both directions) gives shooter the opportunity to quickly level the rifle while setting up for hasty shots and provides a more compact lighter weight alternative to the original grip without sacrificing stability. Specifications for Kopfjager Reaper Rail Upper Assembly: Manufacturer: Kopfjager Color: Black Condition: New Features of Kopfjager Reaper Rail Upper Assembly Compatible with Picatinny rails Locking Cant Adjustments Smooth pan and tilt movements poised to make follow up shots easier Can directly mount ton 3/816in tripods or Arca Swiss mounts Userfriendly offset design Package Contents: Kopfjager Reaper Rail Upper Assembly Reaper Rail Upper Assembly Kopfjager KJ86004: Reaper Grip Upper Assembly Picatinny Black