I'm curious if those water mirrors are going to be the gun countermeasure (Ike will probably get shot by the general guy in the back after the mirrors work and he's assured of his success or something).
It's certainly possible the guns just don't work but the deck is already stacked against them, faulty equipment on top of that would just make it one-sided (unless he planted faulty guns on purpose for them to recreate, which would be hilarious, but I'm sure they'll at least test them beforehand).