Ruger Weaver-Style Scope Base Adapter for Mark I II III and 22-45 Clear. 22 Target Pistol Scope Base Adapter 90224 allows you to mount a scope to your .22 target pistol. Designed specifically for the Ruger Mark I II and II .22 caliber pistol this riflescope base provides a secure mounting platform for Weaver-style rings allowing you to increase your accuracy with your Ruger .22 pistol. Though the Ruger .22 Mark I II II Scope Base Adapter isn't compatible with Ruger rifle scope rings you can screw on a variety of other rings to your .22 pistol using the mount's three screws. Available in a clear finish the Ruger Base Adapter for Ruger .22 Target Handguns can enable your Ruger Mark I II or III handgun to mount the latest in optics technology. Specifications for Ruger Scope Base Adapter for Ruger Mk I II III Handguns: Weapon Type: Ruger Mark I Mark II and Mark III handguns Mount Type: Weaver Style Rails Features of Ruger .22 Pistol Scope Base Adapter: Allows you to attach a scope to Ruger .22 pistols Compatible with Ruger Mark I II and III handguns Available in clear coat finish WARNING: Does not fit Ruger scope rings Package Contents: Ruger .22 Target Pistol Scope Base Adapter 90224 Ruger Weaver-Style Scope Base Adapter for Mark I/II/III and 22/45 Clear