Warne Quick Detachable Ring Mounts CZ 550, BRNO 602 (19mm Dovetail) 1" Medium Matte (1BLM)Since each firearm manufacturer has their own proprietary mounting rail design, each ring model must be machined to exacting tolerances for proper fit and function. Because of this, the Warne CZ Rings are able to fit right onto the receivers dovetail with no need for a mounting base. The CZ Quick Detach Rings sport the unique Warne indexable lever system which allows the user to remove the optics from the rifle then reattach it without the loss of