[s]Oh, and just for the record, he re-purposed the rifle sling as a shoulder-sling to his bread-bag (Russian butt-pack) making it into a shoulder-bag, then put all his ammo-pouches in front so it's at about chest-rig/bandolier height.[/s]

If it isn't winter, then he probably left the greatcoat behind and I'll need to describe his lower-layers as some sort of other mil-surp button-down shirt like the OG-107 type II, American-issue of the late 60's, or a HBT uniform of 1941 surplus.

Will probably also fashion a crude poncho out of a tarp.

Tarp will be secured by ammo-belt. And yes, I do realize it [the belt] weighs nearly as much as the rifle itself.

[url=http://theredguard.weebly.com/infantry.html]His attire doesn't match this website's but the way it is being worn sort of does.[/url]
-Except the tarp... see also: how to wear a great kilt/cloak. (the short pleated kilt is about as ancient as the tank-top)
*A brooch is simply a weighted rope.