I remember this stuff from history class
actually my very first setup was a M1956 LBE with 4 universal cases, 2 canteen covers, an idiotstick, 61' buttpack, USMC jungle FAK, compass case, XM28 LW riotmask and an anglehead.... managed to put all that together back when I was in the 7th grade (1987ish) out of pieces I would uncover at local swap meets and the like.
Cheerios
EGG