In his Talking Points Memo tonight, Bill O'Reilly reacted to growing calls for gun control, stating that no amount of legislation is going to stop a madman from killing.

O'Reilly pointed out that there are more than 300 million civilian-owned firearms in the U.S., according to congressional research data. He said that means that even if gun sales were halted - which is unconstitutional - there are already millions and millions of guns here.

O'Reilly said that tracking, record-keeping and background checks are indeed helpful, in order to keep people with criminal records and mental problems from obtaining firearms.

"Liberal Americans who want all kinds of regulations are being irrational," O'Reilly stated, pointing to the high murder rate in a Chicago, a city with stringent gun laws.

He said that all gun crimes should be federalized, with gun laws themselves made by individual states - with the exception of instances involving mental health and convicted criminals.

"If someone commits a crime using a gun and is convicted, they should receive a mandatory five years in a federal penitentiary on top of the punishment for the other crime," O'Reilly suggested. "That would go a long way in stopping the abuse of guns, would it not?"

"But laws cannot stop madness."

Watch the full Talking Points Memo above.

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