wwiiol Stolly cross oposted this over at wwiiol.
I think I am sticking to this as being "fake". Despite GScholz's great research theres no way to tell if this wav is actually the the aircraft he linked.
There was a edited version (actually just a snipped version) of this wav on earthlink's sounds of ww2. They were selling the full version. It was put on that sitedated 2000. I believe thats around the same time this first made the rounds.
Feel free to believe what you want but theres a number of things that arent right. The lack of eng noise is one for me but this recording had to made from the intercom. The crew most likely were wearing masks. I am not sure what type of mic was used or how they were keyed (push to talk, voice activated or what). The gun noise just doesnt seem right.
Read the link above if you can.
YMMV