Truglo TG948AR Fat Bead Ithaca/Rem/SKB/Wthby Orion Red Fiber Optic Black
https://www.tandktactical.com/shop/788130421826-truglo-tg948ar-fat-bead-ithaca-rem-skb-wthby-orion-red-fiber-optic-black-2347
https://www.tandktactical.com/web/image/product.template/2347/image_1920?unique=62b9732
The Fat Bead is a large diameter fiber-optic bead replacement sight. This sight features 6-48" threads.