I'm just the radio clown in the turkey costume. Please feel free to spread the word about this event, all proceeds benefit AZ Heroes to Hometowns helping military vets returning home to AZ.
Here is the official word from VIP Airsoft in Gilbert on the fps:
"The guns that they will be using are high-end G&G M4 Carbine AEG rifles. Yes, they can bring in their own airsoft gun, however it must chrono at or below 330fps with 0.20g bb. House bbs must be used, no personal bbs will be allowed for the event and/or general arena game play.
https://vipairsoft.net/faqs/The FAQ link includes information about rentals, safety gear, things we do and do not allow in the arena and some other important informations. The second "What is Airsoft" link gives background information about the sport in case people ask. "
Cheers!
-Shmonty