I know they do. But following an argument with a friend, I was wondering what you guys think? I was claiming that most gun owners are rather responsible and follow the law. Specifically watching out to not break NFA laws such as SBR registration (attaching a stock to a pistol for instance) and machine gun laws (owning illegal machine guns or converting weapons to fire at full auto illegally). He claimed that a lot of people are probably doing it. I said that for most gun owners who are aware of the law and know the cost in terms of punishment it is simply not worth it. So what do you think? Did you get to see people wit illegal SBRs and machine guns?