The Sig Sauer Alpha Series 35mm Aluminum Top Ring is a precision engineered mounting accessory designed to expand the utility of your tactical or long range optic setup. Specifically crafted to replace the standard top half of an Alpha Series 35mm scope ring this component adds an integrated 1913 Picatinny rail section directly above the primary riflescope. Machined from high strength 6061 T6 aluminum with a durable matte black anodized finish it provides a rock solid platform for mounting secondary accessories such as reflex sights rangefinders or lights. Its streamlined one piece design maintains a 1.535 inch centerline height and ensures precise alignment and zero retention even under heavy recoil making it an essential upgrade for shooters requiring a versatile multi optic configuration. Sig Sauer Alpha Series 35mm Aluminum Top Ring to 1913 Pic Rail SOA55R01