The fixer class equipment at level 1 is the explosive ammo pack necessary for this achievement. This is best done online since bots in offline won't pick up the ammo.
What I did to get this achievement quickly was dropping my bag as often as possible when we weren't being swarmed by pressing
and then looking directly at it and pressing
to ping it so my teammates were aware that it is there for them to pick up.
You can only carry one bag at a time, so make sure to pick up equipment refills whenever possible so that you can drop a lot more of them so you can get the achievement sooner!