The Sig Sauer Alpha Series 34mm Aluminum Top Ring is a precision mounting solution designed to increase the modularity of your optic system. Engineered to replace the factory top cap of an Alpha Series 34mm scope ring this component adds a rugged 1913 Picatinny rail directly above the primary riflescope. It is machined from high strength aluminum and finished with a durable matte black anodization for long term corrosion resistance. This single piece integral design provides a stable zero retaining platform for secondary sights rangefinders or lights while maintaining a streamlined profile and a 1.535 inch centerline height. It is a reliable choice for tactical and precision shooters who require quick access to multiple sighting systems on a single platform without adding unnecessary bulk. Sig Sauer Alpha Series 34mm Aluminum Top Ring to 1913 Pic Rail SOA54R01