Gov. Jared Polis signed into law Friday morning a bevy of new gun regulations that advocates hope will tamp down gun violence in the state and had opponents pledging to sue over as soon as his pen hit the paper.
The new laws restrict gun purchases to people age 21 and older; create a three-day waiting period before a purchaser can take possession of the firearm; expand who can file so-called red flag laws to include medical care providers, mental health-care…