Once you've looted an Arc Probe or Arc Courier, you'll be able to turn in the A Bad Feeling quest back in Speranza. But ...

As you get used to the environment of Arc Raiders and go on more topside raids, you'll also get various quests from different traders. Some of these quests can be as simple as defeating a few enemies, ...

If you are running low on Rubber Parts, then finding ARC Flex Rubber in ARC Raiders is the best choice. Like most of the other machine items, you can also acquire this one by defeating various ARCs, ...