We don't litereally use the items we buy. Ammo is obtained through the use of Energy Cells, and we usually assume we have enough on hand to complete the mission (or if you want to throw a screw ball, ruin out of ammo).
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Jester Squad
+ Advance Recon Commandos {ARC} +
SL/GSG Garet Daimun/1SQD/2PLT/1COM/1RGT/1BAT/Tadath/VEA [ES2C] [IH]
Life is for the strong, to be lived by the strong, and, if needs be, taken by the strong. The weak of the world were put here to give the strong pleasure. I am strong. Why should I not use my gift?
-Zaroff, Most Dangerous Game