Arena 149's limit is 350 FPS tested on 0.20 gram BB's
HPA powered Airsoft Gun's power is measured by joules and have a limit of 0.95 Joules which is 320 fps on a 0.2g and 287 FPS on a 0.25g.
The Heaviest BB weight that can be used at the Arena is 0.25 grams.
Bio or Biodegradable BB's are NOT PERMITTED