Funny you mentioned that. When I was in Ranger school carrying my M16A2, I swore I smelled chocolate one day on patrol. This is not unusual- food and sleep deprivation for an extended period of time plays all kinds of tricks on your senses. Except this time I was right, because my Ranger buddy smelled it too. It turns out that the last student who was issued that weapon put a snickers bar in it, because when the course is over, the students are allowed to have junk food at the tail end when they are cleaning weapons and equipment, turning stuff in, etc., and the last guy "threw me a bone". As soon as I found it, I shut that cover up. That night me and Ranger buddy very covertly and quickly split the snickers bar, and there was much rejoicing. Before I left, I inserted a bag of trail mix in the stock.