Vortex Optics Hunter Riflescope Rings These Vortex Hunter Rings position the center of the riflescope tube at a height of 0.75 inches (19.0 mm) from the base. Mounting to a Picatinny or Weaver type rail, the standard, 2-screw Hunter rings are a nice match for general hunting setups. Made from aircraft-grade 6061-T6 aluminum for optimum strength. Sold two rings per package.