Troy Industries SSIG-FBS-FHBT-00 FBSFHBT00: Troy\'s Front Folding Battle Sight is easy to install and deploy, with no levers or springs to fumble with, and no tools required for adjustment. It can be moved or taken off without permanent modification to the firearm. A stainless steel cross-locking system ensures sights remain upright and zeroed under extreme combat conditions. A push of a button folds the sight securely out of the way until you need them again. It is machined from hardened aircraft aluminum with stainless steel components and finished in Mil-spec hardcoat anodizing. Each click adjusts .50 MOA. This item is a HK front folding sight with a black finish.