 When Vito Corleone, Clemenza and Tessio are going to the gunsmith  the owners name is Augustino Coppola, later in the scene he  introduces his son, Carmine Coppola, who demonstrates his flute  playing abilities. This scene is a tribute to Francis Ford Coppolas  father and grandfather. His father was the first flautist with the  NBC symphony under Arturo Toscanini. His Grandfather was an actual  gunsmith. His father worked in the "shop" from time to time as a  child. They both insist the event actually happened.