I use GW miniatures, but am not a 40K player. So I can look at the miniatures and makes a guess about what's what, but don't have the 40K rules to compare.
So I'm looking at the Eternal. I see it has an upgrade to a flux rifle, but it comes the same as a Warrior, but with better defense. The figures I have come with two barrels on their guns. Are they not supposed to be any better than the Warriors' guns?
Also, I see a bunch of upgrades for the Warriors. Do those represent some specific figures with which I'm not familiar, or are they opportunities for kitbashing?