Your site may chronograph in Feet Per Second (fps) however, as far as the law is concerned you should be measuring the power in Joules. As per the Police & Crime Act, the legal limit is 1.3J for Automatic Weapons, or up to 2.5J for a Semi-Automatic (DMR/Bolt Action).

Your Currently Shooting At: Joule(s)


Airsoft Energy Chart:

The 2 charts below show the Joule Limits based on specific BB weights.

  • Note:
  • The top chart is for fully-automatic RIFs & bottom one is for semi-automatic.
  • Green indicates a safe joule limit
  • Yellow shows a safe but narrow gap in restrictions.
  • Red is over the legal limit.


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