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.Requires front sight tool.Standard m16 a2 front sight.Type: Folding FrontFrame Material: Aircraft Grade Aluminum/Stainless Steel ComponentsFrame Color: Black Hardcoat AnodizedFirearm Fit: HKBase Configuration: Picatinny RailStyle: Folding Back Up Front SightFront Material: AluminumFront Color: BlackElevation Adjustment: 0.20 cmFirearm Type: AR Platform