This is the actual bag that accompanied me to the Ghan, a SORD Day Pack.
Back then it held everything but the kitchen sink; ECM, batteries for that bloody thing, 2 spare mags, extra bags of ammo/link, a Patrol Medic kit as I was also the PM (Combat First Aider was the Aussie term), food, water, cam netting, if you can think of it, somehow it was in there!
I bought this bag from SORD Australia, there is
http://www.sordusa.com/ now, 1 of me mates discharged and joined the company and actually made a package based on my setup!
It's been through the wringer, blown up a few times and is still in 1 piece. I absolutely love it!