fireclub 1"/30mm dovetail scope mount rings medium profile for 11mm/20mm dovetail picatinny weaver (2 pieces) (30mm,11mm,low) fireclub precision machined from aircraft-grade aluminum alloy with anodized black matte finish. complete with stop-pin for rock solid application. ring base designed with locking hex screws to tightly fit on mounts with airgun/.22 dovetail dimensions. reversible locking plate to fit full range of airgun/.22 mount