Being bonded out is not the same as not enforced. Do you not understand the basics of our criminal justice system?
Ask Plaxico Burress if there are consequences from illegally carrying a gun. I mean, there are thousands of people in jail right now for that very crime. That gun laws aren't enforced in GOP states (which is what you are talking about mostly) isn't something that you can just fix by saying so. It's just a fucking excuse.
Oh, and the reason why gun possession crimes aren't always prosecuted is precisely the point I made above: it's extremely costly, and it will do nothing to solve the gun availability problem.
It's so tiring to hear about the people who obey the law. Everyone obeys the law until they don't. The dad of the kid who just shot up the Georgia school -- did he have a criminal record before now? The kid certainly didn't.
Closing gun factories is a type of policy called a prophylactic measure. We have these prophylactics in all areas of our lives. Almost all of them were adopted because the ad hoc approach didn't work. Watering stocks was against the law and people could be (and were) prosecuted for it in the 1920s -- but enforcement could never keep up. So we put in securities laws as prophylactics: they are the regulations that keep so many lawyers busy. We used to prosecute snake oil salesmen when they sold dangerous and ineffective products, but again this was expensive and not effective so now we have an FDA approval process. Consumer product safety is promoted by prophylactic strict liability laws.
Everywhere you look, there are prophylactic laws and regs that protect us from harm. Except for guns, by and large. And hmm, what part of life gives us more trouble? Guns used in homicides, or electric blankets that catch fire?