Specifically designed and engineered to be rugged, streamlined, and dependable, the FDN FX10 is that and so much more. Fixed at 10 power, the FDN FX10 is built to withstand extreme hunting and environmental conditions, all while delivering top-tier optical clarity and reliability. The FDN FX10 features a 6061-T6 aluminum 34mm tube, low-profile ER3K elevation knob with a zero stop, ergonomic capped US#1 windage knob, integrated illumination and parallax knob, and customization options that will undoubtedly meet your needs.