Hi,
I recently played lasertag with some of my friends.
Wouldn't that be a cool Build idea?
Having two or more guns, with evenutally some props like bombs or revive packs?
As an extra, you could let the guns communicate with wifi or something else with a computer to configure the teams, colors and get the results of the game.
A interesting board to work with is the Wemos D1 Mini, based on the esp8266. It has Wifi build in, and can be found for approx $4.
Regards,
sibrecht