On November 1, 2015, 21 O.S. section 1272 (A) will not list switchblade knife as a weapon that is illegal to carry, however, dagger will still remain as an illegal weapon. Most people would call an OTF knife a switchblade, however most OTF's are double edged knives. (Daggers) Is the double edged OTF a legal switchblade or an illegal dagger. Just some food for thought. I have no answer and I'm a defense atty. It can be argued both ways.