Vantage riflescopes also boast a fast focus eye bell and high torque zoom ring for smooth, easy magnification adjustment which stays firmly in place after the recoil. Waterproof and shockproof with nitrogen-purged optics to prevent fogging and misting, the riflescope 1” chassis is machined from a single piece of lightweight, aircraft-grade aluminum and incorporates a specialist erector system to maximize internal stability.