Designed to attach to the Ruger style integral dovetail to convert the mount style to a Mil-Spec 1913 Picatinny rail design. With 1913 rail Mil-Spec, Multiple-sight systems such as ; red dot, holographic, reflex and standard magnified optical sighting is available to the shooter. Works with Warne Maxima Quick Detach Rings. Mfg: Warne Mfg. Company SPECS: Aluminum, matte black. 4.75" (12cm) long.