My answer doesn't really fit any of the voting options: I will buy a gun if/when Daas Torah says it's the right thing to do. I'm assuming that if things get worse, people will start asking rabbonim, and I'll hear about it.
Regarding our neighborhood of Y-m, RYBs said no when asked in public.
When asked in private, he said it's too much hishtadlus for people like us in this place. Then he said something along the lines of, "Lamdanim shouldn't have guns."
Feel free to interpret that any way you like.