Okay, so this thread has veered way off topic, and is in the wrong place anyway
Hmmm... The wild west shoot out, with paintball guns. If you do the paintball masks right, you could almost get a Westworld theme going on. The thing you would have to keep in mind is to keep the velocity as low as possible, especially with the very close ranges that you will be dealing with. The major problem is finding equipment that looks even remotely connected to the era specified.
How could you have a slogan like "freedom is slavery" when the concept of freedom has been abolished?