Winchester Enters The Thermal Market
This guide details the installation and zeroing process for the Winchester THSX 640 Thermal Hunting Sight, based on insights from a 90-day field test by 4MR Ranch. It covers mounting, power, zeroing parameters, and crucial zero retention verification, highlighting the optic's performance and durability in real-world hunting scenarios. The review emphasizes practical application over extensive technical features, suitable for hunters and tactical users.











