Eh...I was hoping they wouldn't resort to fake guns, but you had to have seen the writing on the wall when they installed the new speakers. The number one selling feature of the new sound system is precision - they control exactly where the sound goes. Makes sense once you connect the dots.
Shame about the replacement sound effects though. I wish they could record the actual sound each gun makes and replace it with that. If Terminator can recreate realistic gunfire, so can WaterWorld.