Yes, they are probably the best spec'd bbls out there but they are expensive for his recons. From what I've heard they are worth it. AR15performace and Titan Armory hooked up and are producing the Extreme bbls as a joint effort. I can't remember the exact line, but it seems something like all orders west of the Miss. River go to AR15Performace and all easy go to Titan. I honesly can remember the exact line, but it's something like that.

There's ton's of info at 68forums about both of them and they are both active posters there. There's also a lot of reviews abouth both of them and Bison bbls from posters there as well.