The Leupold Mark 4HD riflescope brings advanced features and durability for professional-grade performance. Here's an overview of its key specifications and features: Specifications: Magnification: 2.5-10x Objective Lens Diameter: 30mm Reticle: TMR illuminated (First Focal Plane) Eye Relief: 3.7-3.9" Field of View @ 100 yds.: 42.2-11' Tube Size: 30mm Turret Type: M5C3 elevation/capped windage Adjustment Gradation: 0.1 MIL Elevation Adjustment Range: 24.7 MIL Windage Adjustment Range: 24.7 MIL Length: 12.5" Weight: 21.5 oz. Features: Professional-Grade Optical System: Unmatched light transmission designed to perform in challenging conditions. Industry-leading glare reduction for clear images in harsh, direct light. M5C3 3-turn Elevation Dial: Provides 30 MILs of adjustment in 0.1 MIL increments. ZeroLock system ensures the dial won't move when knocked around. ZeroStop: Easy return to zero after adjustments. First Focal Plane Illuminated TMR Reticle: Hash marks for increased ranging and holdover precision. Aiming points for wind and bullet drop compensation. Useful at all magnifications due to the first focal plane. Motion Sensor Technology (MST): Extends battery life by automatically deactivating illuminated reticles after five minutes. Rugged Build: 100% waterproof, fogproof, and shockproof. Integrated Throw Lever: Enhances ease of use for quick magnification adjustments. Made in the USA: Reflects Leupold's commitment to quality. Backed by the Leupold Lifetime Guarantee: Assurance of durability and reliability. The Mark 4HD is designed to meet the demands of professionals, providing an exceptional balance of performance, accuracy, and durability. Whether engaging in close-quarters combat or identifying threats at a distance, this riflescope delivers consistent and reliable results.