Are you located in ROI? If so there's a pretty strict limit on airsoft guns.
This from
Wikipedia:
The status of airsoft in Ireland was changed after the 2006 Criminal Justice Act, which amended the previous Firearms Acts. Where once authorization or a license was required for all devices which fired a projectile from a barrel, the law now defines a firearm as (amongst other things):
an air gun (including an air rifle and air pistol) with a muzzle energy greater than one joule of kinetic energy or any other firearm incorporating a barrel from which any projectile can be discharged with such a muzzle energy
The aim of this change was to establish a classification of firearms in order to eliminate the legal oddity where toy suction cup dart guns and the like were legally classified as firearms, thus bringing Ireland into line with the rest of the EU. In this case, one
joule was used as the limit, as opposed to seven joules in Germany, twelve
foot-pounds force (16.2 J) in the UK and so on.
The one-joule limit most likely arose from UK case law
[citation needed] where it was found that energies in excess of one joule were required to penetrate an eyeball (thus causing serious injury). As a result, airsoft devices under one joule of power have been declassified and have become legal to possess and use within Ireland.
No airsoft site in Ireland would allow any player to use an airsoft device in excess of one Joule.