Hi @Verlax_fy
This is from one of our devs:
The most straightforward way is to set Eliminated Player’s Items in the Island Setting from Drop to Keep so the weapons would be retained rather than dropped. Island Settings in Unreal Editor for Fortnite | Unreal Editor for Fortnite Documentation | Epic Developer Community
If you want to make sure the loadout is save crossing different game sessions, you can also simply use the Save Point Devices for this purpose by making sure Save Loadout is enabled. Using Save Point Devices in Fortnite Creative | Fortnite Creative Documentation | Epic Developer Community.