I was nearly arrested for carrying a mini AFCK, which was confiscated. The problem is the lock. According to the officer who interrogated me (quite harshly, I might add), if the knife locks open, as opposed to a Swiss Army Knife which does not, it is an illegal weapon.
BTW, if you are stopped with a locking knife, do not, without first seeking legal advice, admit that you have used, would use, or intend to use, the knife for self defense. If you make that admission, then you have just admitted that you carry the knife with intent to use it as a weapon, in which case you are likely going to jail.
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Cameron Reddy