Vortex CF2-31039, Crossfire II 4-16x50mm AO BDC Reticle Rifle Scope SKU: CF2-31039 Description: With long eye relief, a fast-focus eyepiece, fully multi-coated lenses and resettable MOA turrets, there's no compromising on the Crossfire II. Clear, tough and bright, this riflescope hands other value-priced riflescopes their hat. The hard anodized single-piece aircraft-grade aluminum tube is nitrogen purged and o-ring sealed for waterproof/fogproof performance. Specifications: Reticle: Dead-Hold BDC (MOA) Magnification 4-16x Objective Lens Diameter 50 mm Eye Relief 3.7 inches Field of View 25-3.7 ft/100 yds Tube Size 30 mm Turret Style Capped Adjustment Graduation 1/4 MOA Travel Per Rotation 15 MOA Max Elevation Adjustment 50 MOA Max Windage Adjustment 50 MOA Parallax Setting 25 yards to infinity Length 14.37 inches Weight 23.6 oz Features: Fully Multi-Coated: Proprietary coatings increase light transmission with multiple anti-reflective coatings on all air-to-glass surfaces. Second Focal Plane Reticle: Scale of reticle maintains the same ideally-sized appearance. Listed reticle subtensions used for estimating range, holdover and wind drift correction are accurate at the highest magnification. Dead-Hold BDC (MOA): Customized hashmark design helps eliminate guesswork on holdover and windage corrections. Good for hunting/shooting at varying ranges where estimating holdover is a concern.