Actually I spent 35 years in the infantry and I NEVER saw that happen, not from recruit training to mature troops in the battalions. Everyone was responsible for their OWN weapon. Even machine guns were done by their crews, although stripped into a wash basin perhaps, they would be done by the men responsible for them. I didn't serve in a closet either. Lots of different armies and countries and places...so that part of the story is bunk.
The rest, well, we weren't as in the dark as you think. That's why this thread died 7 LONG years ago...we usually leave them that way and start a fresh one...