Talking to a political candidate yesterday, I had the following conversation:
C: If someone wants fully automatic weapons, they should join the military.
Me: I did, and spent over 22 years. Why should I give it up just because I retired?
I'm still the same person I was then, and just as likely to use it in civilian life as in military (which is to say, highly unlikely since there is still no formal combat role for women). In fact, I didn't serve in combat, so statistically speaking am less likely to have combat-related psychological issues.
I don't really see it as an issue of need, and I certainly don't want the government determining I can only have what I need.