Specifically engineered for use with RugerA(R) 10/22A(R) rimfire rifles, the WarneA(R) Scope Mounts Maxima 2-Piece Base for Ruger 10/22 Rifles is a durable, 2-piece scope base, constructed of durable, yet lightweight CNC-machined steel for improved field performance and enhanced stability in virtually any environment. Plus, this scope base comes equipped with a corrosion-resistant anodized finish for lasting field service in harsh, potentially corrosive hunting applications. Compatible with most Maxima scope rings. Includes TorxA(R)-style mounting hardware. CNC-machined steel construction Corrosion-resistant finish Includes installation hardware Compatible with most Maxima scope rings