Folding rear sight on the gun. In the folded position functions as a conventional pistol sight with a phosphorescent light points, in the tilted position the visor-type M16. Visor is tipped by simply pressing a button and can be attached to a standard 21 mm RIS rail using a screw. The part is mainly used in combination with a folding front sight "Warrior Rhino auxiliary sight unit - Front". Ideal for use with off collimator. Visors are available in matt black finish.