Looks like a cut up and molded stock crown point barrel.
It would be suspect on how it shoots, with those tips I would wager cutting up paint as it's shot through it. Plus, it would be hell if they happen to be bent inward.
Out of all the barrels that have come across my workbench, I've never had a crown point. From pictures, I do believe you are right.
Breech end: .689
Tips: .880
Ridges that run up each arm of the "crown": .695
With the ridges (they end .190 before the tip of the arms), I don't think its likely that a paintball would hit the tips, anymore then the chance they would hit the ring at the end of an unmodified crownpoint.
Someone took the time to mill it, cut the tips evenly, and then polish the visible portion of the barrel.
Looks like a candidate for the aluminum scrap pile...or the lagoon.