Someone may have already said this, but if you read grimoire for glimmer and whatnot, it's implied that we use glimmer as "bullets." The fact that we pick up these "boxes of ammo" off the ground also adds to the fact that glimmer is used as a ammunition as well. It's so funny when people try and prove a scifi wrong using real life logic. Next you're gonna make a thread on how, logically, Hunters shouldn't be able to double jump. To think you typed all this for nothing.