From Joe Biden, the Firearms Expert

Biden recounted been shown x-rays of what a firearm could do to the human body.

'A 9mm bullet blows the lung out of the body,' the president said. 'There’s simply no rational basis for it in terms of self protection, hunting.' 

FROM HERE

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Of course, this is the same guy that advocated "Get a shotgun. Just get a shotgun" which really will blow a lung right out of a body.

We need some consistency here, partner.