For my PTW I will be carrying 7 120rd mags, 6 in the vest and one in the gun
For my ICS I carry 7 68rd mags, 6 in the vest, one in the gun
plus I carry a small bag of BB's and a loader.

M14 -

3 70rounders on my belt, 1 in my gun = 280.

My M14's Semi only.. So I tend not to blow through too many mags.

2 hi-caps clamped together by themselves.
for SIG 552
=660 rounds
2 USP magazines
=50 rounds

Due to personal prefrence, i only carry gbb's

-9 ksc glock mags
-2 tm 1911 mags

4 maruzen m11 mags (now all sold to hypercube)

The worlds ugliest electric-wind mini-box mag. Made just to see if it could be done.

realistic loadout, 10x 33 round m16 mag
4x 15 round for the sig p226 (also help with steady gas pressure)

PTW: 7x120rd
G&P M4SF: 9x120rd G&P, pinned at ~60rd so they feed better
CA33E: 8x80rd

Stuff I used to own:
WA SVI: 4x33rd

33

HK11: 10 mags (700)
M4: 12 mags (816)
M249: only need the one box mag(2500), but i try to carry 6 extra M4 mags, both to fill up those empty pouches and reload the riflemen in my squad.

I carry all I have...3 P-90 mags and 2 92FS mags.

10x 65rd mid caps
4x lowcaps
2x pistol mags

I have a Marui M14, and have 8 440 round hi caps. I've never shot more than 1500 rounds in a day, so I now just take 4 of them and a bag of BBs, just in case :)

With the way I have my Ciras setup, I carry for my M4 27 Star 85rnd mags. And yes, I have gone threw just about all of them in one day, the firefight we had once at the barn saw almost 20 people and a good amount of ammo. As Nachopudding said that day, in that 20 min firefight we must have used $80-$100 worth of bb's between both sides firing into and out of the barn, even one of the game admins said that it looked like a solid wall of bb's going either way, and even saw a few hit in mid air.

Dedicated umm.....MG.....uh....M14?

???????

in my current set up, i run 12 20rd G3 and one in my gun so thats 260
plus my 2 USP mags at 25 so thats 50 right there.

totalling 310 i normally run that at most games, i have my 550rd high cap witch normally gets brought out for skrims and loan mag to another player with a G3.

i always have to laugh when i see people with M4 high-caps that carry more then my entire rig. but i'm a realism whore to say the least.