technically IS do have unlimited ammo as pointed out by Stratos. If you go by real world science, the capacity of quantizing means you just need the data and break down other elemental components found in the surroundings and just reform their molecular structure and finally into a product. If you want to play a little game of god you could probably have quantization screw around with subatomic structure and have hydrogen turned to oxygen or something(am I right on this?), then repeat the last few steps.
@zero: Fillia is in another class at that time
and yes someone has to drag him to infirmary, he loses consciousness a few seconds after he realizes he's bleeding.