Hiviz Sight 1. The Magni-Hunter vent-ribbed shotgun sight fits rib .230" to .330" with there proven magnetic base. The skeletonized base provides the perfect balance of light-gathering optimization and durable protection of the interchangeable LitePipe. The additional light allowed into the LitePipe ensures visibility in early morning or late-evening hunting situations Specifications for Hiviz Sight MGH20071: Mfg Item Num: MGH20071 Supplier SKU: 68209 Category: GUN SIGHTS Type: Sight Color: 2 Red/ 2 Green Firearm Type: Ventilated Rib Shotguns .230" to .330" Base: Magnetic The Hiviz Sight MGH20071 is a quality addition to the HiViz lineup. For more great deals on Fiber Optic Pistol Sights by HiViz please browse our HiViz Gun Parts page. HIVIZ Mangi-Hunter Magnetic Shotgun Sight with cross-eye dominant correcting technology. Fits shotguns with ribs from .230 to .330 (15/64 to 21/64) (5.8mm to 8.3mm). Includes two Green and two Red replaceable LItePipes.