Winchester 70 Quick Release 2 Piece Weaver Style Base Matte Finish by LEUPOLD MOUNTS & ACCESSORIESLeupold brings accuracy to the popular cross-slot format! A few turns of the thumb levers is all it takes to connect or disconnect your scope from the one or two-piece base and or Picatiny-style rail. Each time the scope is reattached it will return to within one half a minute of angle of the original point-of-impact on the target.