Game-breaking bugs that prevent you from progressing are the worst…
How to fix the Lost Armory Delta quest bug in Dying Light 2
The Dying Light 2 Firearms update has brought with it some unfortunate bugs and errors. While bugs aren't usually too much of a problem, they can be particularly troublesome when they prevent you from completing a mission.
One such bug is the one some players have encountered during the Lost Armory quest. If you are one of them, don't worry, we have a solution for you!
If you have a bug where you can't progress your Lost Armory Delta Quest, just fast travel to another location and start a new quest. This should allow you to bypass the previously bugged mission.