Compatibility

I have a Franchi I-12 that I would like to put a dedicated barrel to just shoot slugs. I have tried to find a used barrel to cut down, but no luck.
On another forum it listed the Stoeger M2000 as a direct clone of the I-12.
Do any of the gunsmith “experts” on this forum know if that’s true or if a M2000 barrel will actually fit and work on the I-12?
Thanks