Ledsniper&reg; Front and Rear flip up 45 Degree Rapid Transition BUIS Backup Iron Sight Ambidextrous Iron Sights, for both left and right handers Machined from 6061 Aircraft Aluminum and T6 Heat treated Aluminum body Level 3 Mil Spec Hard Anodization; Compatible with most Picatinny / Weaver rails Low profile sights with 45 degree orientation, no interference with primary optics / laser sight Rapid transition flip up sight allows you to transition seamlessly between your primary optics and your backup iron sight.