...it appears as though if you owned any full capacity magazines before July 1 of this year you have only three options, keep them forever (and I guess be buried with them), surrender them to the police or destroy them.
I believe that once you're a resident of another state, at that point, no longer being a resident of Colorado, you could sell them. So maybe four options.
O2
YOU are the first responder. Police, fire and medical are SECOND responders.
When seconds count, the police are mere minutes away...
Gun registration is gun confiscation in slow motion.