Weaver Mounts Multi-Slot Extended Base is a one-piece, low-profile scope rail engineered for Savage Axis I/II bolt-action rifles manufactured after June 2021. Constructed from black aluminum, it measures 0.40 in thickness and features a multi-slot cross-slot interface compatible with both Weaver-style cross-lock rings and Mil-Spec 1913 Picatinny-style rings. Designed for factory 8-40 receiver mounting screws. Includes mounting hardware. Safety Note Always ensure the firearm is unloaded before installing or adjusting any optics or bases. Verify proper torque specifications during installation. Improper mounting may affect accuracy and safety.