A friend has several of these barrels. They are a 9mm bore and about 8 inches long, but may be chambered for either a 380 or 9mm Makarov as a 9mm Luger round seems to stick out a little too far out of the chamber.

Here are some links to a few pictures:

Imgur: The magic of the Internet
Imgur: The magic of the Internet
Imgur: The magic of the Internet

Thanks for any help.

She wants to sell some of these, but need to find out what they fit first.