Feeling safer is not the same as being safer and unless you are worried about a foreign invasion, I still don't see what the military has to do with this. Do you have any evidence that shows gun owners are actually safer? How about data showing assault rifle owners are safer than handgun owners? While it wouldn't end the debate, those would be good reasons to allow assault rifles.
I agree, one rifle isn't that different than the next. Actually handguns are probably more dangerous than semi-auto AR-15s. Now full autos are a different story. Our disagreement isn't whether AR-15s are crossing the line of what individuals should be allowed to own, it's that you say there should be no line drawn at all for any weapon.