There were no guns in any of the post-great wars books until his latest trilogy, but I haven't read it and it's another 100 years in the future beyond the High Druid trilogy, so it's entirely possible that they've invented primitive firearms rather than discovering pre-war relics.
I'm now certain they're going to cram all that's left into the last two episodes. With everything that they've cut there isn't nearly enough material left to drag it out a second season unless they go even farther than full retard on making stuff up out of thin air, but there's enough stuff left that it should be 3-4 episodes, not 2. I think, despite it barely seeming possible at this point, the show will continue to get worse with every remaining episode. I guess it's better to get a shitty full story rather than shitty story that's abruptly cut off when the show gets cancelled so hard that Firefly comes back to life.
I really wish Terry Brooks was going to be at a con relatively close to me just so I could ask him why he broke my heart, but so far the closest I can find that he's going to be in the next 4-5 months is Montana.