A trip to Combat Shooting Sports costs about $150, which includes the cost of the gun modification.

After receiving their modified guns and donning protective gear, customers are broken up into teams and take part in various games ranging from capture the flag to hostage simulations. Games can last from about 10 minutes to more than an hour. But customers are allowed to stay for the entire day and Kaplan says many do just that.

For more recreational users, Kaplan also owns Combat City, which offers customers the chance to engage in target practice and simulated fights using an airsoft gun from the store.

The Airsoft rounds don't inflict serious damage but they do hurt. An explainer on the Combat City website explains, "There is a degree of pain associated with airsoft just like paintball.  It is significantly less than paintball and without the swelling."
And for added safety, participants are outfitted in a set of protective gear including helmets and padding over sensitive areas.