Thanks for the chapter!
LN described things a little differently and better. What Machina meant by not starting wars wasn't Japan or Earth starting a war in the new world, but not being the spark that sets one off. Although how the weapons previous groups had brought over didn't get reverse-engineered or stolen isn't explained, but would be a really big jump in the arms race of whoever managed to duplicate them first. Modern weapons can even let a child kill a group of adults and that's before adding magic or enchantments into the mix. That and without the mentality to NOT use the weapons or fully understand their destructiveness. Think how different WW2 would have been if Germany had modern ideas, methodology, medicines, weapons and vehicles. Granted a knife in the ribs will ruin anybody's day, whether stone wielding primitive or gun toting modern man and all the modern stuff didn't help the previous groups much.
MC is really interesting. Giving up on a familiar weapon to avoid cultural contamination and possibilities of it being stolen and reverse engineered. Although the gun was less useful against things like those thugs who quickly healed the damage due to damage being minimal and not immediately fatal. In any case, going to be interesting to see how he arms himself since he doesn't have guns anymore and if he ever manages to find or rejoin any of the other group members. Likely going to party up with those two elves who patched him up sometime in the future although probably not at least for 10 or so chapters. Also his be nice to see his reaction to seeing Misranika in her human form too.