: Incorporate period-appropriate slang. For a 1920s setting, you might use "bean shooter" for a gun, "beef" for a complaint, or "button man" for a hitman.
The Rough Guide to Gangster Movies 1 (Rough Guide Reference) Gangester
: Every story needs a "Gangland Chief" or boss at the top. Use terminology like Soldato (or "made man") for low-level mobsters and Moll for a gangster's female companion. : Incorporate period-appropriate slang