> what to do if I ended up in Schengen or something and without arms

I don't mean to be rude, but this phrasing makes you sound like an addict trying to work out if you can smoke banana peel to get high. You can just .. not have a gun for a bit on holiday? Rather than engaging in illegal activities? Heck, several countries have tourist hunting industries! (The tourists do the hunting, not hunting the tourists)