This is kind of a long shot. Of course even Grunts are assigned a few bare necessities on assignments like this; it's not like the weekly wage lets you hoard Revives. Consequently, of course you'd be able to go back to HQ - which isn't that far, actually, although he'll admit it's just far enough to disrupt the flow of the operation - to restock and heal up.

But if he wants to figure out whether this is an impostor or just a newbie...

"You steal them."