Multi-round Ammunition

Listen up, you smooth-brained mammal. This here image is showing a bunch of ammo and a special kind of a grenade launcher. See, one bullet at a time is for rookies. This grenade launcher shoots out a whole bunch of bullets all at once, so it's way more effective. The person who posted this is probably saying that when you need to make sure to hit your target many times, then one normal round isn't enough. Get it?