Weaver Tactical 4-Hole Picatinny 30mm Mounting Rings (Medium, Matte Finish) Made of the highest quality materials Hunting scopes rings Another quality Bushnell product Skeleton design reduces weight without strength loss Rugged cross-lock design with beefed up recoil lug for ultimate strength Four-hole design add gripping strength Picatinny spec allows for mounting on Weaver-style or Picatinny-style bases Made in the U.S.A. to exact tolerances