This will pass easily and Polis will sign it into law. It will then make its way through the court system to determine constitutionality.
The other "lesser" bills- waiting period, raise age of purchase, etc.- will also pass.
Then watch for the leftist to rewrite the criteria for concealed carry. Likely a huge fee increase and high reapplication fees. The necessity for classroom learning will be greatly increased from 4 hours to 16, probably necessary at every renewal. The duration of permit will be cut from 5 years to 2 or 3.
This will place a burden on many permit holders in the hope that most will stop carrying (and endangering honest citizens) because the permitting process is too expensive and time consuming.
The next step would be the need for a license to possess in your own home.
This may sound absurd and unlikely to pass in the next two years but look how fast they have moved on the current legislation. When the "assault weapons" ban passes, it will take effect in June.