Ultradyne's Combo set for the C4 Folding Front and Folding Rear Sight sets feature Dynalign Technology, allowing for all the sight elements to move together, maintaining a concentric sight picture at all times. Made from 4140 Chrome Moly Steel and salt bath nitride finish as well as anodized aluminum Rear sight weight: 2.5 ounces, Front sight weight: 2.2 ounces Rear sight 1.38" wide and .369" tall when stowed, front sight 1.21" wide and .369" tall when stowed Interchangeable Aperture Available Includes 12 MOA Dynalign aperture. 8,10,and 14 MOA available. The Combo set regains full range of rear windage adjustment and guar Mfg: Ultradyne Usa