Hi everyone, I just wanted to say thanks to Robbo, Gassy and Mrs G. for all of their help dealing with this situation.
The gun in question was supposed to be the first gun for a friend of mine who is a new player to the sport, so it hasn't exactly been the best first experience for him. The gun was to be shipped to me so I could give it a once over, chrono it etc. etc. to make sure it was in working order before giving it to him. I run a university paintball society here in Ireland so I do this for any new players who want to get gear of their own. I'm sorry its had to come to the point where Robbo has refunded the money out of his own pocket, but at least now that the money is back I can see about finding my friend a new first gun.