The Ultradyne C2 Folding Rear Offset Sight offers the performance and durability you would expect, but it also gives you something far more important; a reliable backup for your optic of choice. No matter what optic you choose it could fail, and offset sights let you keep your primary optic mounted, but have that failsafe in place should something go wrong. C2 Folding Rear Offset Sights from Ultradyne give you the same options that the non-offset model does, with the ability to choose or switch between the .70 aperture or ghost ring. As a bonus, the oversized windage knob can store the aperture when you opt to go with the ghost ring. The windage knob also has a reliable, positive cli Mfg: Ultradyne Usa