Sig Sauer TANGO-SPR 6-24x 52mm Rifle Scope - BDC-1 - High performance meets affordability in the new TANGO-SPR (Special Purpose Rifle) lineup. Clear, rugged, and bright, the TANGO-SPR series is packed with premium features that keep you on-target, near or far. Each configuration comes with a factory-installed SPR Scope Mount for seamless integration with your favorite rifle, while the included flip-back caps keep your low dispersion lenses protected. Dedicated side focus, windage, and elevation dials ensure dependable precision with every round. High performance 4:1 Optical System with Low Dispersion Glass 30MM Maintube MOA BDC1 Reticle Factory-Installed SPR Scope Mount Removeable Throw Lever for Quick Magnification Changes Exposed Zero-Stop Elevation and Low Profile Capped Windage Dials Dedicated Side Focus Adjustment Lay-Flat Flip-Back Lens Covers Dependable Waterproof, Shockproof and Fog Proof Performance