3-12x40 AO Airgun, Black Matte, Mil-Dot, Reverse Recoil Technology designed to withstand the extraordinary punishing recoil energy generated air guns, Waterproof, fogproof and shockproof, Fully coated optics, 1 tube construction, Adjustable objective lens to adjust for parallax, Scope caps included, Backed by Barska's Limited Lifetime Warranty. Specifications: - Magnification: 3-12x - Objective Lens: 40mm - Waterproof: Yes - Fogproof: Yes - Reticle: Mil Dot - Exit Pupil: 13.3-3.3mm - Optical Coating: Fully Coated - Field of View (ft100yds/m100m): 35/11.63x, 9/312x - Eye Relief: 4.2 inch - Click Value: 1/4" - Adjustment Knob: Obj. parallax adj., side adj. windage and elevation - Tube Diameter: 1 inch - Finish: Black Matte - Weight: 18.1 oz. - Length: 13.66 inch - Included Accessories: Scope Caps, and Lens Cloth - Warranty: Limited Lifetime Warranty