Dan Wesson .22 revolver with unique custom scope mount. Since DW pistols have a removeable barrel shroud, bought an extra shroud, had part of the rib machined off for Warne quick release bases. This allows the scope to be removed in seconds to use open sights, no sight obstruction. In seconds the Warne rings and scope can be reinstalled to perfect zero. If I want the gun restored to original condition, simply put the original unmodified barrel shroud back on. Although I haven't done it yet, the mount allows for multiple scopes to be interchanged...dot, crosshair, etc.