Check the listing for details. Vortex Diamondback 4-12x40 Rifle scope DBK-04-BDC - Free Vortex Cap. Color: Black, Condition: New. Listed at 259.00 USD. 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.Magnification 4-12xObjective Lens Diameter 40 mmEye Relief 3.1 inchesField of View 32.4-11.3 ft/100 ydsTube Size 1 inchTurret Style CappedAdjustment Graduation 1/4 MOATravel Per Rotation 15 MOAMax Elevation Adjustment 60 MOAMax Windage Adjustment 60 MOAParallax Setting 100 yardsLength 12 inchesWeight 14.6 oz