CenterPoint 6-20x50 AO TAG Riflescope Rifle scope 6-20x magnification 50mm objective lens (adjustable objective) 1" tube TAG-Style reticle (red-green illuminated) Fast focus eyepiece Tool-free windage and elevation adjustments Finger-adjustable turrets 10 yds to infinity AO parallax setting 25.0-6.3' field of view @ 100 yds 4.1-3.7" eye relief 10.0mm to 2.4mm exit pupil Scope length is 13.86" Includes Picatinny rings, CR2032 battery, lens covers Other features: Nitrogen filled 100% waterproof, shockproof, fogproof Multi-coated lenses