The highest series was designed to endure the harshest conditions. Zephyr scopes are known as multi-discipline optics with a wide range of use. Reinforced single-piece tube made from aircraft-grade duralumin is filled with nitrogen to prevent fogging. Etched glass reticle ensures hard resistance for all kinds of rifles with energy of 7000 joules. You can choose among 16 variations with different magnifications and reticles.