He should move to Wyoming or Idaho. You get to defend yourself there.
I was camping in Wyoming near Fort Bridger and a Wyoming Trooper drove up as we were shooting at cans and stuff. He asked us what guns we had and showed us the new Glock that he’d just gotten. He really liked it. Lol.
Shooting at cans in Massachusetts can get you ten years at a maximum security prison. And possession of the firearm used can get you another ten years.
I have a couple of friends in Idaho. They tell me it’s in danger of becoming another Colorado.