Meta Tatical’s MTA-BUS sights feature all-aluminum construction with type III hard-anodizing.  The sights can sit flat when stowed or be deployed to standard AR sight height.  They also feature toolless windage and elevation adjustments, as well as the ability to mount to any Picatinny / NATO accessory rail.  The MTA-BUS provides fast and precise target acquisition with the HK-style front sight and a dual aperture rear sight.