Quickly! Activate the Tutorial!
If there is no tutorial, just take the shell and the bullet and ram it down both your gun's barrel's. Hopefully, It'll work
fine, light up a cig and take a piss (maybe a dump too)
I have no idea what is happening right now, so you must ignite the chief officer's desk at debriefing.
Proceed to tell him the voices told you to do so.