[url]http://www.ojp.usdoj.gov/bjs/guns.htm[/url]
According to the 1997 Survey of State Prison Inmates, among those possessing a gun, the source of the gun was from -
a flea market or [red]gun show[/red] for fewer than [red]2%[/red]
a retail store or pawnshop for about 12%
family, friends, a street buy, or an illegal source for 80%
During the offense that brought them to prison, 15% of State inmates and 13% of Federal inmates carried a handgun, and about [red]2%, a military-style semiautomatic gun.[/red]
On average, State inmates possessing a firearm received sentences of 18 years, while those without a weapon had an average sentence of 12 years.
Among prisoners carrying a firearm during their crime, 40% of State inmates and 56% of Federal inmates received a sentence enhancement because of the firearm.