The custom-designed Ruger® Rapid Deploy Rear Sight seamlessly integrates on the Ruger® SR-22® Rifle" AR-556® " SR-556®" SR-762® and any modern sporting rifle with a same-plane Picatinny rail mounting system. The rear sight can be used in conjunction with most A2-height gas block/front sights. This lightweight" polymer sight is windage-adjustable; folds flat to make room for optics and is spring-loaded to allow for rapid deployment with the push of a button.