It is then revealed that Lassard's gun wasn't loaded, as he "never carried live ammo since '73".

You saw enough of that, you carried ammo.

I'll carry as much ammo as I can.

We'll need to carry food, ammo, and our weapons.

Every man carried his own gear and ammo.

Aircraft carry limited ammo and requires landing to reload before they can strike again.

One of the vehicles involved was carrying weapons and ammo.

He was carrying with him an assault rifle and ammo, and had killed three people apparently at random.

Originally, the children were taken in order to carry ammo, food supply and equipment to the other fighters.

Therefore: A Marine must carry sufficient ammo to fight with for three days.