Know what the minimum firearm training necessary for a concealed carry in Colorado?
A hunter's safety course (in many counties, though I don't know all).
(ironically perhaps, this is how I obtained mine)
Hunter's education, where you learn valuable urban combat skills like how to carry and store a rifle safely, and how to identify if a particular elk has the legally required points, how to field dress various game animals, and basic wilderness survival.
Oh, and how to shoot a BB gun! Woot!