I tried my best with the 2 boxes available but so far I had to get the upgrade to jump on the cargo section.
The jump upgrade is the easiest way to obtain it, but not the only way. A couple other ways:
- Using the Icarus Landing System
- Stacking three or more boxes to allow you to survive the fall. More items can be found down the adjacent shaft
I don't understand which fall SaintWacko means, but I definitely was able to get to the spot of the Tranquilizer Rifle (behind the stasis pod) by using the two boxes in a very similiar way like in this achievement guide for Never Forget on YouTube. No augmentations are needed because this one can be achieved as one of nine available Factory Zero-playthrough achievements.