The Spuhr ISMS Rangefinder Adapter lets you put a Wilcox RAPTAR, SilencerCo Radius, or other similar rail-mounted rangefinder over your scope. Machined from strong, yet lightweight aluminum, the ISMS Rangefinder Adapter is a solid platform that bolts to the forward ring cap of a Spuhr ISMS scope base. The bottom is angled to clear the objective lenses of most scopes, preventing any interference with the optic. 3.35" Picatinny rail with 8 mounting slots give you versatility in positioning the rangefinder Hardcoat anodized finish, matte black, blends with most scopes and rifle receivers Puts the rail slots slightly less than 1" above the scope, requiring minima Mfg: Spuhr