FEATURES-Black-Sight can be moved or taken off without permanent modification to the firearm-A stainless-steel cross-locking system ensures sights remain upright & zeroed under extreme combat conditions-A push of a button folds the sights securely out of the way until you need them again-Machined from hardened aircraft aluminum with stainless steel components-Mil-Spec hardcoat anodized finish-Each click adjusts .50 MOA-No tools required for adjustment