If you've got a penchant for military simulation and some cash to burn, you may want to take a look at One Shepherd. The method of choice for their simulations and training is MILES (Multiple Integrated Laser Engagement System), a popular choice amongst militaries around the world, as it supplements actual firearms firing blank ammunition to create an accurate laser combat system.
Participants bring much of the field gear required themselves, and are supplied by One Shepherd with a MILES system, night vision, smoke grenades, communications and more. Simulations run anywhere from 8 hours to a matter of days, and cater to milsim gamers, law enforcement, teambuilding or general recreation. There are also training services available, and pricing ranges from $150 to about $800 USD.