This guide shows how to get and install firmware for the Astro A50 (Gen 4) headset and base station using official Astro/Logitech software, plus troubleshooting and key tips.
When you download the firmware update, make sure to check the release notes and changelog to understand what's new and what's been fixed. astro a50 gen 4 firmware link
There is only one official source for updating your A50 Gen 4, and it is not a direct download link for a file. Instead, it is a software application. Astro A50 (Gen 4) — Firmware update guide
There is no standalone ".zip" file for the firmware that you can manually flash. The firmware is baked into the Astro Command Center (ACC) software. You must have the software installed to apply the update. Instead, it is a software application