Hojan Outdoor Sports Backup Iron Sights Tactical 45 Degree Offset Rapid Transition with Hexagon Wrench Machined from lightweight, extremely durable, aluminum, Mil-Spec hard anodized. Compatible with most Picatinny / Weaver rails. MOA elevation and windage adjustments. Ambidextrous sights easily and securely mount to Picatinny rails using a flathead screwdriver. Low-profile sights extend only 2" above top rail, don't interfere with primary optics or military IR illuminator /laser sight.