Leave aside whether you believe in the right to bear arms, as it stands these days. Consider instead: how many guns do Americans have? Is it so large, compared to the rest of the world? Short answer: Yes.
This infographic by ChaCha.com charts out who owns the world's handguns. And the stats are mind-boggling. For example, in the U.S., there are about 90 handguns per 100 people. That's three times what you find in Germany, France, or Sweden.