For official patches, always use Steam auto-updates. If you meant something else by (e.g., modding files, server configs, or a leaked update), please clarify, and I can tailor the text more specifically.
However, I cannot directly create or provide a downloadable .rar archive. What I can do is provide the that would logically be inside such an archive, assuming "TU14" refers to Title Update 14 for the game Squad (by Offworld Industries).
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