Fire up your Kettle grill with the Vortex loaded with charcoal. Don't start cooking until the coals are all lit and starting to ash over.
Rinse the chicken and pat dry.
Place the fried chicken mix into a large baggie.
Lightly brush the chicken with vegetable oil.
Working in batches, place chicken pieces in the bag. Seal and shake. Shake off excess.
Transfer chicken to the grill along the edges, skin-side up.
Cover and cook for 45 minutes, turning the lid 90 degrees every 15 minutes.
After 45 minutes lightly brush the chicken with the Buffalo sauce. Don't be shy. Note: If you are using pieces other than split chicken breasts, you'll want to rotate the pieces at this time.
Cover and cook another 15 minutes or until the chicken hits 160 F. Fee free to brush with more Buffalo sauce, to taste.
Remove and let rest and come to 165 F before serving.