The Armasight Operator 640 Thermal Clip-On delivers seamless, mission-ready integration by mounting in front of a day scope with no re-zeroing required, enabling immediate use straight out of the box. Featuring a high-performance ArmaCORE 640x480 thermal sensor with 12 micron pixels and a 60Hz refresh rate, it provides outstanding thermal clarity, a 1300-meter detection range, and reliable target identification in varying conditions. The 35mm germanium lens and a 1-4x magnification range paired with a 12.60 x 9.40 degree field of view ensure crisp images and versatile targeting across dynamic environments, while the quick-detach mount allows rapid attachment or removal to maintain productivity and safety on the range or in the field. Users can tailor visuals with multiple color palettes and image detail enhancement to optimize contrast and situational awareness, and the unit is operated via intuitive three-button controls for straightforward adjustment. The package includes a quick-disconnect mount, USB-C cable, two CR123A batteries, a lens cloth, soft case, and product manual, making the Operator 640 Thermal Clip-On a capable, compact solution for thermal imaging that preserves daytime sighting systems and expands detection capabilities in low-visibility scenarios.