The Tier One Saddle RAPTAR Ring Top Rail replaces your front top ring on your Tier One Saddle Scope Mount. This top rail has a RAPTAR long picatinny rail for attaching accessories on top of your scope such as ballistic rangefinders or low magnification optics. FeaturesHigh Grade 7075T6 AluminumPicatinny Top Rail Mounting System Note: The Short Saddle version Fits Tier One Short Saddle Mounts with 3 Screw Rings. The Long Saddle Version Fits Long Saddle Mounts with 2 Screw Rings.