It uses American Wild Turkey 101 bourbon whiskey instead of Scotch whiskey and Wild Turkey American Honey Liqueur instead of Drambuie, which is a similar Scotch/Honey blend. Ingredients of the Turkey Nail are about half the cost of the Rusty Nail, and it's almost as good. :-)
Pour both ingredients over ice in a rocks glass, shake or stir to chill. Proportions are to taste; I recommend starting 50/50. If it's too sweet, add whiskey; if it's not sweet enough, add liqueur.