I'd like a little bit of clarification on what is and isn't allowed to be brought in. Would non-magical firearms be allowed, or would that be instead a regain? I'd also ask the same of any other nonstandard, nonmagical weapons that can't fall under a traditional RPG categorization.

As a follow-up to that, if a character were to bring in a weapon that their class normally doesn't have proficiency in, would they be allowed to use it? (eg, character is apped with a spear on their person, but they opt to start as an Expert or Scholar)