You don't need anything special - most of them can be easily disassembled, with most components fitting a purse, not even suitcase. The barrel probably would be the biggest one - it has to be 16 inches long AFAIK or the law is going to have questions (of course if you're about to commit a crime anyway, it may be not that big of a deal, but most places won't sell you an illegal firearm). Still will fit a standard carryon suitcase, or most common backpacks.