A riflescope proves its worth when it performs in the field. STYRKA S5 Series Riflescopes are designed for in-the-field performance and to provide bright, high-contrast images with outstanding clarity and resolution. And, they're constructed of one-piece, 1" aircraft-grade aluminum for structural integrity and durability.Like every STYRKA product, STYRKA S5 Series Riflescopes provide you with numerous important features designed to enhance not only what you see through the scope, but also your hunting experience. In short, we build a riflescope that will give you a lifetime of performance and one that you'll be proud to own. We think that's what matters most. The S5 3-9x40 with side focus and SH-BDC reticle is a popular and proven magnification range and objective lens size with all the features you need.