Yep, pirate, sounds like the original P6 barrel. They are getting cleaned up for resale, but I don't know by whom. It may just be that SIG only makes the P225 barrels now, so if they get replaced at all it is with the newer barrel.
I have seen this explanation a couple of places (a few threads on SIGforum and THR, IIRC), and some people have definitely gotten the P225 barrel in their P6s. I haven't looked that closely at mine yet because it is just a range gun.