Troy's hk front folding battlesight is easy to install and deploy, with no levers or springs to fumble with.No tools required for adjustment.Features- sight can be moved or taken off without permanent modification to the firearm, stainless-steel cross-locking system ensures sights remain upright and zeroed under extreme combat conditions and a push of a button folds the sights securely out of the way until you need them again.Each click adjusts.50 moa.Type: Folding FrontFrame Material: Aluminum/SteelFrame Color: Black Hardcoat AnodizedFirearm Fit: AR-15, M4, M16Base Configuration: Picatinny RailStyle: FoldingFront Material: AluminumFront Color: BlackFirearm Type: AR-Platform