The Dillinger was a level three Tommy Gun that could be bought from a merchant in Midtown. The merchant was located at 42nd Street and 3rd Avenue. It packed a powerful punch and was favoured by the elite guards of the Barzini crime family. It could be upgraded to the Spectre Minigun.
It is likely that this weapon is named after the notorious depression-era bank robber John Dillinger. His gang robbed over a dozen banks and is said to have escaped from Crown Point Jail using a fake pistol carved from wooden shelving.