I know nothing about buying a gun in the UK and then importing it to the USA, but when I bought a gun in Paris I was just required to show my US passport and leave with the gun. I stored it at my apartment there until I had the ATF Form 6/ import permit and then just brought the gun to the US as luggage. I filled out the Form6 paper work and a local dealer here in PA signed it for $20. I mailed it to the ATF and they sent me the permit a month later. I had to pay customs duty at the Philadelphia airport when I declared it and showed the Form6 but there were no middlemen involved. Perhaps the law has changed since the Twin Towers attack but last time I was in Paris I asked a gun dealer if things were the same there and he assured me nothing had changed.
nial
