Combat Cocktail

1 1/2 oz tequila
1 1/2 oz coconut rum
1 1/2 oz pineapple rum
1 1/2 - 2 oz orange juice
1 1/2 - 2 oz pineapple juice
1 splash grenadine syrup

Combine first 5 ingredients in a cocktail shaker half-filled with ice cubes, and shake well. Strain into a hurricane glass over ice. Add a splash of grenadine, and serve.