The Diamondback - loaded with features! First, the solid one-piece aircraft-grade aluminum alloy construction makes the Diamondback riflescope virtually indestructible and highly resistant to magnum recoil. Argon purging puts waterproof and fogproof performance on the agenda, and advanced fully multi-coated optics raise an eyebrow when crystal clear, tack-sharp images appear in the crosshairs. Look for all this and more in a riflescope you'd expect to cost quite a bit more-but doesn't. We can live with that. Features: Fully Multi-Coated Second Focal Plane Reticle Tube Size Single-Piece Tube Aircraft-Grade Aluminum Waterproof Fogproof Shockproof Hard Anodized Finish Capped Reset Turrets Precision-Glide Erector System Fast Focus Eyepiece Specifications: Magnification 2-7x Objective Lens Diameter 35 mm Eye Relief 3.1 inches Field of View 64.3-19.3 ft/100 yds Tube Size 1 inch Turret Style Capped Adjustment Graduation 1/4 MOA Travel Per Rotation 15 MOA Max Elevation Adjustment 100 MOA Max Windage Adjustment 100 MOA Parallax Setting 50 yards Length 11.6 inches Weight 13.7 oz