Atibal Buis Flip-Up Sight Black AT-BUIS PAIR. The rear sight includes a single aperture that is finger adjustable for positive windage adjustments. The front sight allows for tool-less elevation adjustments with positive click adjustments. Both the rear and front sights can be utilized in the folded down position with the built-in sights for low profile configurations. The protective wings help shield the sights from impacts. Specifications for Atibal Buis Flip-Up Sight: Manufacturer: Atibal Color: Black Fabric/Material: Polymer Length: 2.16 in Features of Atibal Buis Flip-Up Sight Lightweight Tool-less adjustments Positive adjustments Co-witness height Protective wings Package Contents: Atibal Buis Flip-Up Sight Atibal AT-BUIS PAIR: Buis Flip-Up Sight Black