They issued us 7 mags in country, but every time I went out I had about 12-14 on me, plus whatever they had stashed in the truck.
You could find loaded 30 rounders everywhere; they would turn up under seats, in little nooks and crannies, on the floors and behind the Blue Force Tracker screens on all the trucks. I found one in the middle of the road in the FOB one day, turned around, drove by it, opened my door and scooped it up as I drove by. Miraculously, it had not been run over, so I kept it in my stash, and still have it to this day.
Kinda funny, they made us turn in all our issue mags, and told us to get rid of all our ammo when the helicopters came to pick us up to take us to Balad so we could catch the bird to Kuwait. We were like, "No fuckin' way, man. What if the chopper goes down on the way? What are we supposed to do? Use foul language?" Our unit CoC never gave us a satisfactory answer, so I kept two mags out of my stash loaded up and attached to the buttstock of my rifle (Hell, a LOT of us did this) all the way to Kuwait International, where I downloaded the rounds into an amnesty barrel and stuck the mags in my duffle bag for the trip home. I still have all 14 of my stash from over there.