Living
in one of the StupidStates, I can't carry a concealed weapon. However, pocketknives with blades less than 4" are not concealed weapons. So... I have a Kershaw SpeedSafe. I took the stupid clip off, and the (totally unecessary) dumb little thumb lever thing on the blade. Perfectly legal, slick as a snake, and as deadly as I need it to be. For all those in a similar situation, I recommend it, if you know how to use a knife. If not, learn. Lots of books available, and you can practice with a stick.
(edited to add):
It is, like any knife this size, a weapon of last resort, and requires close-range work. Not my preference, but I have no other option, at present.