Talley Scope Mount/Ring Combo features a 30mm tube diameter and a staggered medium mount height of 0.540 front and 0.615 rear, measured from the top of the receiver to the bottom of the scope tube. Designed for Browning X-Bolt bolt-action rifles (short, long, and magnum actions), this 2.50 oz 2-piece aluminum system in Burnt Bronze features integrated unitized ring-and-base designs providing 0 MOA offset. It attaches directly to the receiver via four-screw X-lock bases. 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.