Simmons protarget riflescopes are ready out of the box to attach to your firearm with the included rings to hold it snugly in place.It also includes flip-up scope caps that protect the glass and can flip out of the way at a moment's notice.The optics are waterproof, fog proof and shockproof, and feature fully-coated lenses which means crisp, bright images in all conditions.Magnification: 4-16xObjective: 40mmField Of View: 21 - 5 ft @ 100 ydsEye Relief: 3.50"Tube Diameter: 30mmReticle: Mil-DotProofs: Fog/Shock/WaterproofOptic Coating: Fully Coated