Or maybe not. But since the beginning of chapter 3 I've been taking random disjointed notes on my thoughts as I go (mostly pertaining to Narumi, surprisingly enough), and I am sticking them here because I can.
A more obsessed fangirl than I has figured out that the gun Narumi uses is probably the first one on this page. I have no idea why this would ever be relevant in camp, but there's the link just in case I need it later.