The Argos has an open-bridge style some hunters prefer for its secure ergonomic one-handed grip and comfortable any weather condition. They come with superior quality and bright lenses that are Advanced fully multi-coated for sharp contrast, true color and excellent light gathering. They also have Bak-4 prism glass that have our new ESP Dielectric coating and phase correction for color fidelity and sharpness. They also have an Argon purged waterproof, non-fogging polymer composite chassis that takes weight off your neck but stands up to the demands of hunting.