I lived in Colorado for half of the '70s, a much different place than it is now.
A state of contradictions; 80% of the people live east of the continental divide and they get 80% of their water from west of the divide.
The westerners are still solid Red, but the easterners are a burgeoning bunch of aging hippies and other liberal (anti-gun) types that hold sway in the legislature. The knee jerk reaction to the shooting in the movie theater was to go after hi-cap mags. Thing is they grandfathered the existing ones, but mags don't come with a date of manufacture.
Just imagine the bootlegger trade smuggling out weed and trading in part for hi-caps for the trip back in. I know the former is happening.
Its a mess. A certain western Colorado Sheriff not to be named has stated he won't attempt to enforce "idiotic restrictions".