Together with a FAST Offset Optic Adapter Plate, which is required for the FAST Offset Optic Base to function, it provides a base for attaching any number of mini red dot sights directly to the scope mount. The Offset Optic Base places mini red dot sights at a 35 degree offset from the scope tube for faster transitions. When used with the Optic Adapter Plates, the mini red dot will have a mechanical centerline of 2.05” above the rail.