This review covers the Winchester THSX 640 Thermal Hunting Sight, highlighting its 640x512 sensor, <30mK sensitivity, and 12-micron pixel density. The reviewer, Kyle from 4MR Ranch, conducted a 90-day test on a 5.56 platform, focusing on zero retention and durability, including surviving a truck drop. The THSX 640 is presented as a capable, albeit basic, entry into the thermal market with solid core performance.
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