UnKnown barrel, any help?

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.

my guess is that the barrel is from a Madsen M53 sub machine from Denmark ?

Quote:

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Originally Posted by RCS

my guess is that the barrel is from a Madsen M53 sub machine from Denmark ?

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Robert, I believe you are absolutely correct. That one had me really stumped. Thank you very much.

Quote:

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Originally Posted by RCS

a Madsen M53

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Yes it is.