Ultradyne C2 Folding Rear Sights impress not only with their well-thought-out design, but with the quality of materials and versatility. The sights use 416SS and 6061 alloy aluminum in their construction to deliver the perfect balance of strength, and lightweight performance, and are made right here in the USA. The Ultradyne C2 Folding Rear Sights let you choose or alternate between the .70" aperture and ghost ring. So you can customize your shooting experience to fit your preferences or needs. Use the .70 aperture or ghost ring Windage adjustable with A 1/2 MOA click value Oversized windage knob stores aperture when not in use C2 Folding Rear Sight Mfg: Ultradyne Usa