Sounds like you got one of the new Izzy Flash Suppressors.
Originally, the Izzy design was used for post-ban muzzle brakes, but later was modified to be used as a flash suppressor. The flash supressor is too new for any user feedback, but looks very similar to the Phantom. I wpuld guess the two to be pretty much interchangeable.
All that said, if you ordered a Phantom, and you want a Phantom, you should have received a Phantom.
I'm sure if you talk with BM they will swap it out for you.