Sporting Rear Sight Base with three styles of Uprights. Perfect as replacement sights for customizing the sight picture, or adding adjustment to fixed sight guns. Fits standard 3/8" dovetails; available with Semi-Buckhorn Uprights. Mfg: Marble Arms SPECS: Dovetail Model – Total heights: #64, .275" (7.1mm) – .505" (12.4mm);
