Grade New AR15 AR 15 Front and Rear 45 Degree Rapid Transition Backup Iron Sight Set This is Unbranded (made in China). Machined from lightweight, extremely durable aluminum, Mil-Spec hard anodized 1/2MOA elevation and windage adjustments Same height above bore as standard-issue M4 / M16A4 sights Ambidextrous sights easily and securely mount to Picatinny rails using a flathead screwdriver