This is more a guide of when you can expect to unlock this with a tip to help.
TLDR.
I got this...
•New game plus (you get more gel and scrap and your upgrades from the first playthrough carry on through)
•During chapter three - just start mowing down bad guys, shouldn't take long into NG+
•If you really struggle for gel use the shooting range (unlocked after chapter three - you get even better gel and scrap rewards this time round)
- with your upgrades you should find this fairly easyAfter you complete the story you can access new game plus which will make this easier as you get a lot more gel and upgrade components. You will not be getting this cheevo in one playthrough.
New game plus has to be on the same difficulty that you completed the story - beets101 has said that lowering the difficulty on NG+ shouldn’t hamper your progress.
Playthrough one I was the biggest scavenger but still didn't max out gel or weapon upgrades.
Edit. LoL @ negative votes.
What even is the point?
(Thx TA community)
Edit. Thanks to Xx bRICKed xX for this vid suggesting all Red Gel/High Grade Weapon Parts locations: