The custom-designed Ruger Rapid Deploy Rear Sight seamlessly integrates on the Ruger SR-22 Rifle, AR-556, SR-556, SR-762 and other firearms 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.