Ultradyne C4 Folding Rear Sight 7.62/.308 Black. The Ultradyne Ultradyne C4 7.62/.308 Folding Rear Sight uses a purely concentric circle-in-circle sight system that is intuitive and easy to use. This allows you to quickly switch from aiming through a glass optic to the iron sights without having to adjust saving you precious time in tough engagements. Plus the durable iron sights can fold down when you need them to letting you clear your field of view when the rear sight is not in use. Grab a set today to upgrade your rifle Specifications for Ultradyne C4 7.62/.308 Folding Rear Sights: Manufacturer: Ultradyne Color: Black Additional Features: 7.62mm/.308 Caliber Sight Mounting Orientation: Top Mounted Sight Position: Rear Gun Make: AR Platform Front Sight Color: REAR SIGHT ONLY Rear Sight Color: Black Deployable: Yes Fabric/Material: 416 SS with Nitride Finish/6061 Aluminum Hard Coat Anodized/CNC Machined 7075 Aluminum Included Accessories: None Illumination Color: None Hand: Right Last Chance: Yes Mount Type: Picatinny Features of Ultradyne C4 7.62/.308 Folding Rear Sights: Purely concentric sight picture with an inner aperture and outer circle for easy alignment Elevation Adjustments that match ballistics paths of standard M80 ammunition Elevations adjustments in 50 Yard increments out to 600 Yards 18 MOA total Windage-Adjustable with positive location marks 1/2 MOA/Click Interchangeable .070 Aperture and Ghost RingSpare aperture conveniently stores into windage knob Strategic use of materials to maximize strength and minimize weight 4140CrMo with Nitride Finish / CNC Machined 7075 Aluminum 4140CrMo with Nitride Finish / CNC Machined 7075 Aluminum Package Contents: Ultradyne C4 7.62/.308 Folding Rear Sights Ultradyne UD10410: C4 Folding Rear Sight 7.62/.308 Black