Neither have I. In the Marines I was issued a "day pack" (glorified back pack) or what we called a "war bag" War bag being a reverence to an overnight bag you kept in your car in case one of the nice younge ladies of southern California decided to invite you over for the evening. We called them "war bags" because our SgtMaj would always end his safety briefs with "If you go to war this weekend wear your flak and kevlar" IE prophylactics. Now that I am older and wiser and married the 'ol war bag gets used to hold my rifle data book, ammo and cold weather gear as well as camel back. My heavy sweater makes for and awesome field expedient rest for the back of my Mcmillan A5 stock and Harris bi-pod up front.