Feyachi Flip Up Rear Front Iron Backup Sights & 45 Degree Front Rear Backup Iron Sights Rapid Transition Fits Picatinny Rail Mounted 1/2 MOA elevation and windage adjustments Low-profile sights extend only 2" above top rail, don't interfere with primary optics or military IR illuminator /laser sight. Compatible with most Picatinny / Weaver rails. Ambidextrous sights easily and securely mount to Picatinny rails using a flathead screwdriver. Machined from lightweight, extremely durable, aluminum, Mil-Spec hard anodized.