If Roberts 2021 is the same Roberts of 2008, I expect the court will rule that Shall issue is constitutional, but may issue is not. Roberts signed on to Heller. Read the majority re the interpretation of "bear."Will be interesting to see how this plays out. I think a lot of people on both sides are going to be disappointed.
However, if Roberts is the Roberts of 2012+, where the Affordable Care Act was upheld on the taxing power, and he finds a squish in Kavanaugh or Barrett and peels one off, who the heck knows? I could see him arguing keep and bear means keep and bear in your house, because if you can keep a bearable arm in your house, you can bear the bearable arm in your house. But the 2A says nothing about outside the home.
So: Will Roberts have Bacon and Eggs for breakfast the day they decide the case, or will he have Scrambled Tofu and Raw-nola?
God, I hope it's bacon and eggs.