The Yankee Hill Machine YHM-9627 is a robust, all-steel front sight that aligns with the rear sight to provide an efficient backup iron sight. It features a push button that allows the sight to fold out of the line of vision and flips and locks into the deployed position with ease. Installation is straightforward thanks to the included thumb screw. The sight is designed to accommodate all standard AR sight posts and hardware, which are included in the package.