Missouri. It's "easy" but...kind of weird too. You have to provide proof of a certified CCW instruction class. Then, you take that proof to the police department in your area. Then, you fill out paperwork and get printed there. Then, they contact you, by mail, informing you that you have been approved. Then, you have to drive back down to the police station and get your approval document. Then, you take that approval document to the local vehicle license place. Then, you fill out a form there and get your actual carry license, which is identical to the driver's license, only just a CCW. Or you, can opt to get a CCW note put on your driver's license. Turn around time for me was about four weeks.