Rapid Action Turret technology: This incredible new system, based on a .223/5.56mm 55-grain polymer tipped bullet, simply and effectively allows you to dial in your elevation anywhere from 100 to 600 yards away in less than one revolution! Now you can stay in the middle of your Nikoplex crosshair at virtually any shooting distance with a quick turn of the turret. Eye Box technology: Every model features an impressive 4-time zoom range and four inches of constant, non-critical eye relief. A massive ocular lens delivers a huge, exceptionally bright, high-resolution sight picture. One-piece main body tubes: For minimum weight and maximum strength and durability. Ultra ClearCoat® optical system: Nikon has engineered the entire optical system to provide the shooter with a bright, sharp, incredibly flat sight picture and light transmission up to its theoretical maximum—95%. Smooth zoom control: Magnification reference numbers are viewable from the shooter’s position. Waterproof, fogproof, shockproof: Nitrogen-filled and O-ring sealed.