My favorite aftermarket aperture sight manufacturer, Tech Sights, has expanded their line to include the Ruger Mini-14 and Remington 597.
Over the standard Mini-14 rear sight, Tech Sight’s sight allows click adjustment of both windage and elevation adjustment ands the choice of optional aperture sizes.
For any .22 LR, a real aperture sight is far nicer to use than the horrible leaf sights that most (all?) manufacturers tack on to them at the factory.