The bit showing the need for a barrel change/cooling says it all. You'd need an extra man to carry the spare barrels. And another, with his 4 tonne truck, to carry the ammo. Not much access to convenient streams in the desert. "No. 2, hand me the spare gun while you dip this one in that puddle we came across 3 days ago." Impressive engineering, but so is a Mercedes and you don't use it as a main battle tank. It has its uses but I'm not sure it has a place in an 8 man infantry section. Adapt it for an aircraft maybe, with ram air cooling.......