Yes - in most locations.
For our backers in the UK: it's important for you to know that while it is legal to own a knife with a locking blade in the United Kingdom, it is illegal for you to carry one. Though the WildCard should pass through British customs, we cannot guarantee it - each package is at the discretion of the customs official reviewing it. We made a WildCard prototype with a non-locking blade specifically for our British backers, and though we got it to work reasonably well, we feel that it is not safe enough to send out.
If you're concerned about whether or not you are allowed to carry a locking blade or folding knife in your city, state, or country, please contact your local authorities with questions.