This scope was built to thrive amidst the challenges of rugged field use and abuse. The rugged 30 mm tube is constructed from a single piece of lightweight yet durable aluminum. The tube’s exterior is hard-coat anodized, and then it is o-ring sealed and purged with argon gas to ensure a fog-resistant water-tight seal. The erector assembly has been thoughtfully designed, precision-built, and meticulously set into place. Special care has been taken to reduce wear and tear while enhancing durability and repeatability. With features such as matched turret/reticle subtensions, CRS zero stop mechanisms and precision ranging reticles, the Viper PSTs are ready for any situation.