There is nothing in the 2nd Amendment not word one that precludes common sense. And as sick as I am of the half-baked analogies and false equivalencies, I'll offer up one of my own. One can purchase and drive a Ferrari, despite it's potentially dangerous speed and power, because it still incorporates the things that state gov'ts require for street legal vehicles. It has rear view mirrors, head and tail lights, turn signals, etc. But a AAA rail dragster is not street legal because it does not include such features even though it's still an automobile. Common sense attributed to the law. Driving the Ferrari at it's top speed through a residential neighborhood is the absence of common sense attributed to the driver contrasted against the common sense law of a 25 mph speed limit.

Are you seeing the flaw in your analogy yet?