Ultradyne Rear Sight Folding C2 Picatinny Aperture Black. Fully machined from the perfect combination of 416 SS and aircraft aluminum to maximize strength and weight. The positive click oversized windage knob serves as storage for the .070 aperture when using the ghost ring. The sleek design keeps your rifle looking good while delivering remarkable performance at the range and in the field. The C2 REAR SIGHT is a high quality folding rear sight that was engineered with accuracy in mind. Specifications for Ultradyne Folding C2 Picatinny Rear Sights: Manufacturer: Ultradyne Color: Black Gun Make: AR Platform Front Sight Color: No Front Sight Fabric/Material: 416 SS with Nitride Finish/6061 Aluminum Hard Coat Anodized/CNC Machined 7075 Aluminum Front Blade Height: 0.7 in Hand: Right Last Chance: Yes Mount Type: Picatinny Attachment Type: Picatinny Features of Ultradyne Folding C2 Picatinny Rear Sights: DYNALIGN SIGHT PICTURE TECHNOLOGY. Ultradyne exclusive alignment for accurate and immediate acquisition ONE-HANDED DEPLOYMENT AND STOWAGE. Positive detent allows operation without manipulation of buttons or latches. INTERCHANGEABLE APERTURE. Spare aperture conveniently threads into windage knob until needed. REAR APERTURE. 0.050in Ghost Ring Available MOUNTING. MIL-STD-1913 Picatinny Rail WINDAGE. 40 MOA Total 1/2 MOA Per Click MASS. 71g / 2.5oz DIMENSIONS. 34mm / 1.34 inches (Wide) 12.7mm / .5 inches (Height Stowed) 42.4mm 1.67in (Standing) Package Contents: Ultradyne Folding C2 Picatinny Rear Sights Threaded Ghost Ring.0.070in