Permissive open carry states
A state has passed full preemption of all firearms laws. They do not prohibit open carry for all non-prohibited citizens and do not require a permit or license to open carry. Open carry is lawful on foot and in a motor vehicle. It must be noted that while open carry may be legal in such jurisdictions per se, persons openly carrying firearms may be detained and cited by law enforcement officials for disorderly conduct or disturbing the peace in certain locations and circumstances where openly carrying could cause public alarm.
check out the chart for the states which apply these rules: