SHAKE all ingredients with ice and fine strain into chilled glass.
Lemon zest twist (discarded) & star anise
Like the gun this cocktail is named after, this small drink that packs a hell of a punch, and to ensure it does, MacElhone calls for a couple of dashes of absinthe in place of the lemon juice used in earlier Soixante-Quinze (Seventy-Five) recipes. The result being a dry spirituous drink.
Adapted from a recipe in Harry MacElhone's 1926 book Harry's ABC of Mixing Cocktails.