Yes he means leak while you are trying to fill it. In this case the leak will come from the barrel through the transfer port because the valve derlin is not sitting completely back to the valve seat. Is better to cock your gun before filling .
All of my FX guns came with air. But I purchased all from UA. They normally inspect all the guns prior to shipping it out. But like stated above. FX Has a great warranty and they will fix any issue for FREE unless you mess with it then they will decide what is fair.
Ok, I've tried to charge it but its not my day... The compressor works fine, tested up to 200bar.
I have connected the supplied filter to the compressor and the FX fill probe at the end. Both ends inside the threads have a small white delrin washer. When I connect it to the Wildcat and try to charge it, the pressure does not increase and there is a leak from the fill probe side. Maybe its the attachment of the fill probe to the filter because the filter does not have a lot of threads inside. When I remove the probe and close the hole of the filter the pressure goes up again. I have placed some teflon now around the probe threads but I will try again tomorrow.