I will be spending some time in Wyoming and Colorado where I will have to OC. After checking opencarry.org I'm not the least bit worried about OCing in Wyoming and for the most part in Colorado although Denver regs and restrictions somewht remind me of Salem, Portland, Beaverton. At any rate as I was reading through various summaries of states OC rules/regs the concept of preemption is talked about. For instance, Oregon's preemption statute only covers concealed handgun license holders from city or county passed bans against loaded firearms in public places. Wyoming has complete state preemption of all firearms laws, open carry is constitutionally protected and law enforcement is aware of its legality. :thumbup: Colorado is a confusing state. Denver filed and won a suit challenging the states excellent preemption law. Consequently, both open carry and unlicensed open car carry in Denver are prohibited. There are reports that other localities are planning to follow suit. Currently, outside of Denver, car carry is unrestricted and localities are almost completely preempted in enforcing firearms restrictions, and must post specific facilities which are off limits to open carry. Can someone explain this concept of preemption to me? Thanks.