Weaver 99693 Tactical Ring 6-Hole Picatinny, 30mm Medium Made of the highest quality materials Hunting scopes rings Another quality Bushnell product Improved crossbolt from Weaver to Picatinny spec Six screws for extra security and clamping pressure Type-3 hard coat anodized finish Increase height options for broad applications and firearms Available in 1" and 30mm diameters