No personal firearms allowed in Vietnam. Even the 4-in folding buck knife I carry in my pocket they tell me is illegal. I've only seen about 20% of police officers with a revolver. I've never seen any long guns or military hardware or anything like that anywhere. They keep it all behind the gates of the stockades or compounds. Crime rate is near zero in Vietnam. As for cars there are probably only about 20% cars as compared to motorcycles. There are however lots of trucks. The import tax on vehicles excludes most people from buying one. Which is okay because gas right now is almost $1.50 a liter