Nc Star Quick Release Cantilever Ring Mount, 30 mm Mounts your optic forward to give you more Eye relief or rail space behind the optic for a magnifier, iron sight, or another accessory Works with 30mm scopes and Reflex optics An adjustable locking quick Release mount is Compatible with Weaver/Picatinny type rails Mount height is at the AR15 height for co-witnessing with your iron sights