The Achievements section of Ghost Recon Network explains it for each one.
https://ghostreconnetwork.ubi.com/en...t/achievements
Like for the backpack, it is: TUNNEL RAT
You've visited all sections of the website
In lame terms, visit EVERY part of the GRN, profile editing and all.
For the cap: JOINED THE RANKS
You've created or joined a Task Force
etc ..
many of them aren't working from day one, some others where working fine until they add the new section of crates to the website and now aren't working, some others where rolled back ex: you have created 50 events and next day magically you have 25, so don't feel bad if you do what you supposed to do and don't get rewarded, if you fill a claim will be wasting you time, i fill many claims since the beginning and none where fixed, good luck.