Ok, just bought this as an upgrade for my Ion. Testing it out, it seems more accurate than the stock ION barrel (which isn't that bad anyways). It is extremely light and has a great shiny black finish to it. My only grip (and it's a fairly big one) is that there are no rubber o-rings on the barrel backs. This causes them to unscrew from my marker fairly consistently during a game and I always have to be aware of this problem and keep an eye on the barrel just to make sure it's not coming loose. There is even a little groove for the o-ring on the barrel back which leads me to believe that maybe they forgot to put them on mine. Either way it's a concern, also since there isn't a rubber o-ring there I'm wondering if there is some air leakage when I shoot. Meh, either way, I'm putting rubber o-rings on them and that should take care of the problem.
8/10 because I don't like to constantely be worried about my barrel coming unscrewed