In Canada we can't carry hand guns where ever we want. It is pretty tight but I have a factory sawed off double barrel. One with buck shot and one with a slug. How useful it is, hopefully I will never know. But I was also thinking about getting one of those folding .22
It's legal if the overall length is no shorter than 26" and the barrel at least 18", by federal law, here in the USA. Local laws vary... wouldn't want to be carrying that thing around in California, New York City, New Jersey or a few other places I could think of.
John Evens Arvada, CO
Kitfox SS7 N27JE
EAA Lifetime
Chap. 43 honorary Lifetime