The OKO QD1 Quick Detach mount allows mounting of an OKO protective steel cover SC2 to a Weaver type rail. The SC2 protective cover bolts to the QD1 mount, and the OKO sight, (Either a "W" or a "U" series) then mounts to the SC2 protective steel cover. The QD1 mount clamps to the Weaver rail using two hand-tightenable internally threaded knobs.