Tough guy talk on the internet has moved from comical to sad. It doesn't help, and it just makes gun owners seem like petulant children sitting behind their computers spouting revenge fantasies. Pointless.
This is modern politics. First, recognize the game. The other side is a step ahead here. Healy knows the law is borderline irrelevant, and that any Mass court or jury will almost surely agree with her when an evil black rifle is right there on the table.
You don't win by being right, by threatening (or dreaming) of violence, or by venting frustration from a keyboard. In fact, you don't win period. What you do is understand how to play the game with cards you are dealt. Play never ends.
You are in Mass, surrounded by anti-gun voters and with a government that overtly hates you, as a gun owner. Accept that or move. That's step one.
Next, assuming you stay, play this game the only way you can. Find an enemy of your enemy and then goad them to action. Here and now the play is to do all possible to get power centers in Mass to be offended by the political move by the AG. Get them to move back.
Concretely, the best way to do that is probably via GOAL. I sent them $500 yesterday and likely will send them more soon. Also support Comm2A. I do that too. They will be playing a longer game, but it's likely where the bigger win can be found.
Finally, patience. Your corrupt government can move much more quickly than you can. That's the price of living in a state where gun owners are despised. Accept that or leave. Complaining won't help.