I disagree wit the tyranny accusation. I highly doubt that Feinstein wants to be able to tell you what to eat for dinner, or anything else. She just wants less guns.
I think too many people see the government as creeping towards tyranny. My problem with that theory is this: When was the last time the government did anything nearly that organized? Instead of a malevolent dictator trying to take rights, I see government as an inept bureaucracy slowly infringing on rights because it's what the majority of people want and because it's gotten so big that it can't help itself.