(Single Player mode) I'm on the Coup d'etat level. Mission is to hold & draw attention away from the VIPs
I'm in a parking garage, armored vehicle approaches from the North & parks it's ass on my doorstep
I take out a rebel at ground level, take out snipers upper left, upper right of center & upper right.
make my way to the roof - to waiting helicopter support
I can reload ammo for my existing guns, but I cannot load/use the "ZUES-MPAR" - for taking out the armored vehicles
I've tried a number of ways to play this stage, i.e. go to the north end of the top of the parking garage to take out extra rebels that suddenly show up.
All is quiet. A stockpile of grenades unloaded on the armored vehicle does nothing.
Tried unloading/discharging all my weapons, to see if I could pick up the Zeus (no luck) My attempts to load the Zeus shows a brown bar in the weight indicator, instead of green.
H-E-L-P!

Have a read through this should help.
Also try and use the Graw forum, you might get a quicker responce.
http://guides.gamepressure.com/ghostreconadvancedwarfighter/guide.asp?ID=990

Your suggested link didn't yield much understanding. I'm simple.
Can you direct me to the "GRAW" forum?
Is my particular question common?

Try looking at the top of the forum