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In this video i go over some of the updated features of ACE arsenal and some use-case examples for mission makers. With the added export ability and some simple scripting for manipulating the resulting array as a string, you can easily make some portable, customizable arsenals for your missions.
The script for grabbing the loadouts of units in the mission is available here: https://ace3mod.com/wiki/framework/arsenal-framework.html#13-arsenal-only-with-items-from-default-loadouts-see-section-4