Back-Up Iron Sights (BUIS) are a standard accompaniment on most AR-15 rifles. Iron sights, of course, can also be used a primary sights. Some find iron sights to be faster and more accurate in certain situations. So, whatever your predisposition is, iron sights can be useful to you.
This YHM flip-up front sight is extremely durable. It is made from steel, which makes it tough enough to be put through hard use. The sight has an integrated Picatinny mounting base. The Yankee Hill front sight is designed to be mounted on a Picatinny top rail that is the same height as the Picatinny section on your flat top receiver. Since, this sight is made from steel, it can also be mounted to the appropriate height railed gas block.
When not in use, this front sight folds away neatly. However, when needed you can deploy this sight very easily by simply flipping it up.
The sight is secured to your Picatinny rail by a quick and easy included thumbscrew.