Looks like the MP40 pouch is attached to the shoulder and not on the chest rig. Question is how?!
In case this is news, there are several YouTube videos of all the cutscenes from the game so there is a wealth of references now. *SPOILER ALERT* Here's the link to one: https://youtu.be/wmaad0IIUUg. There is a pivotal scene that focuses on Del starting at 13:50. However, if you are playing the campaign and want to avoid plot spoilers, you should not open this link.