This has been brought to my attention several times, but never felt like asking the forums. I see people using plugins to completely disable the Machina, and I also see people using TF2Items to change the gun. (Couldn't figure out the config) So really, what I'm curious about is if there is a way to disable the sound of the Machina on the server (so you don't have to hear constant collateral sounds from the bots being shot).
If the sound isn't possible, how do you use TF2Items to change the gun players use even if Machina is chosen in their inventory?