**Sight is designed to work on same plane rail systems only. Will not work with a railed gas block that is higher or lower than the receiver.
When you include a backup sight on your weapon, it should not be a handicap when it comes to either quality of construction or functionality. To be sure, the vast majority of shooters rely on some form of optics for their primary method of sighting. Certainly, with its folding ability, the Troy HK Battle Sight allows for unrestricted use of your primary optics. However, when the inevitable happens, only you can decide that whether or not adding a couple of ounces for a Troy HK style sight is worth the risk of you becoming that guy.
The Troy SSIG-FBS-FHBT-00 is able to lock in so perfectly because of its stainless hardware. Troy Industries maintains that the stainless pin lock system on their Troy HK Battle Sight will withstand 1,000 pounds of force before failure. So, about anything short of a plane landing on your Troy HK front sight isn't going to break it. When using your optic, the BattleSight folds down and locks securely in place. When it is needed, you simply flip the sight up to return to its usage position. Troy's precision machining ensures that the sight will return to the exact same position every time, so you don't have to worry about sighting in all over again.
The Troy HK style sight uses an HK style hood to protect its sight post. This Troy SSIG-FBS-FHBT-00 design gives you a circle-in-circle sight picture that many shooters find to be more efficient. When the length of your sight plane is properly set, the rounded hood on the Troy HK front sight provides a very precise sight picture. Your brain instinctively perceives this illusion as a bullseye, and we all know what to do with those. Additionally, the Troy HK style sight will shorten the learning curve for new shooters, quickly building their confidence.