The TWS (Supreme-Grade Thermal Scope) name has been long known for the most robust, reliable and technologically-advanced thermal weapon sights available on the professional market. Evolution never stops and time has come to introduce the latest incarnation of this truly legendary system: the TWS Series, the most technologically-advanced professional thermal sights yet. The latest generation silent and Auto-NUC sensor is at the base of the TWS, GSCI proprietary hardware and software solutions are built around the sensor an offer exceptional image quality along with unique tools for added tactical advantage and user safety. Shutterless FPA with Auto-NUC technology guarantees a silent, reliable, and most importantly uninterrupted operation of the device. The TWS is fully dust- and waterproof, meets and exceeds modern standards. It is a perfect tool for long-term, intensive use in any environment, in any lighting or weather conditions. TWS-6100-MOD (100mm) is the advanced professional-grade thermal weapon sight for aiming and engagement on a wide variety of firearms at medium- to long-range distances. Ideal for medium or large-size caliber rifle, machine guns, whether single or repetitive shooting. It is also a great tool for reconnaissance and tactical surveillance.