That sounds pretty ridiculous to me, but you have to check your facts first. Search the Colorado state code for keywords like "conceal" or "concealed" and read the applicable carry laws.

Are you required to register any of your firearms in the state? Seems that if you have the permit to carry, and don't need to register a new pistol bought from a dealer, then you wouldn't have towith anything else. Does this friend of yours knowing anything about guns and carry, or is he being an armchair expert? Just look for yourself so you don't run into trouble down the road.