I don't know. It certainly looks like a factory installed barrel. I haven't seen many this short though. I can get some more close-ups if you like. There is also a pic of the bottom in my album. I know it is missing the lanyard loop. Seems to function just fine. Shoots .45acp
I have been told that the gun has been either re-barreled, or chopped. I cannot confirm nor deny that, but regardless, I will drop the price to $800.