The Ruger 90329 Scope Base Adapter provides a reliable mounting solution for optics on your Ruger firearms. Constructed from durable black aluminum with a Tip-Off/Weaver mount system for secure scope attachment.Ruger 90329 Scope Base AdapterBlack aluminum construction for durability and corrosion resistanceTip-Off/Weaver mount compatibilityFits Ruger 10/22 rifles and 22 Charger pistolsSingle piece design (rings sold separately)Essential for shooters looking to add optics to their Ruger 10/22 or 22 Charger this adapter provides a stable platform for improved accuracy and target acquisition.