I had one that mushroomed out on a rifle about 6 or 7 years ago. It was a much older style design than what is currently available. And mine only mushroomed out after we were full auto testing the rifle. It was mag after mag, and even a Beta. At the end of that day, we noticed it had opened up.
Smith Enterprise, who makes the Vortex, replaced it for free with a newer model. I have had it on the gun since then. We've full auto tested the gun no less than twice since putting the newer Vortex on and it is still 100%.
The new Vortex's that are out are probably one of the strongest flash suppressors available. I have been told they are made out of the same metal as a bolt carrier (tough stuff). Take a look at one next to anything else available. While it is an open ended design, the tines are THICK! The metal is much thicker than any of the many style Phantoms available. I have also bent a Phantom about 5 years ago, Hawkeye helped me fix it!
In any case, after having bent both a Phantom and Vortex, I thinkit much more likely I would bend a Phantom or A2 over any of the several Vortex's I have. Get a new style Vortex (I think the G6 is the latest model), and forget it. I think they are probably one of the best options you can get.