I was wondering which states allow it. I thought AZ was the only state, but I took the 15 minute drive into NV today to register my mp40 and to pick up the paper work for a non-resident ccw and they told me if I choose to carry in NV It must be in plain view until I recieve my permit. With the registration card I can now also carry it loaded in the car and can be anywhere( under seat, on your lap). As without it being registered you can not open carry, or carry it in the vehicle loaded or within reach. It has to be locked away.