The Back Up Polymer Flip up Front Sight with standard iron sight elevation adjustment mounts onto a 1913 Picatinny rail and accepts any standard front post blade. A standard front sight tool is required with each click equaling the standard 1/4 MOA. Unlike other backup sights MFT has developed a shroud that shelters the front post blade from debris and impact damage when not deployed. A slim profile allows the sight to sit under most optics. Manufactured using a specially developed reinforced, super tough polyamide. Made in the USA Features: - Full Elevation adjustment, tool required - Low profile snag resistant design - Shroud protects front post blade from debris and impact damage - Accepts any standard front post blade - Can fold to the rear, the correct direction if dropped Color: Black..