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. Available in three heights for 30mm tubes. Available Hunter 30mm Rings MPN Height Optical Centerline 30MRNG-L Low 0.75" 30MRNG-M Medium 0.94" 30MRNG-H High 1.22" Learn More About Vortex Hunter Rings Vortex Hunter 30 mm Low Rings (Set of 2) Picatinny/Weaver Mount (.75 Inch / 19.0 mm) 30MRNG-L