I'm on the flight deck and that dumb bitch keeps screaming USE THE TAC GUN! And I have NO idea where this thing is. I'm trying to look for it somewhere on the deck but I keep getting frozen. The last I seen it was when I was getting upgrades to my suit down in the armory and now apparently I'm supposed to have it? How do I get it?
EDIT: This is for the 360 version so I didn't keep a pile of saves so I can't really go back.