AK-47 and a Truck!

I envy Middle America. Notice how she tries to sound like she knows what shes talking about when it comes to guns. "...Semi assault weapon..." Whats the difference between an AK-47 and a semi automatic rifle that fires .308 rounds? Magazine capacity? News coverage since Vietnam has made the AK-47 so popular, its almost a BAD thing to own one. Ill take two...