It's usually the union member gun owners who vote Democrat. But, there are a ton of new gun owners in Chicago who did and will continue to vote for Dems. I've had serious conversations with many of them over the last two years. In their words, I see a few justifications for this. First, for many of them, firearm freedoms don't top their list. Let's be honest for 99% of gun owners, firearm freedoms don't top their lists, else they would do something to defend those freedoms. Second, most are convinced that they aren't coming for our guns. The second group can sometimes be educated, the first group not so much.
With millions of new gun owners, I'd wager most of the new gun owners are democrat voters.