Dry brine the turkey legs the night before you cook them. First, pat them dry with paper towels. Sprinkle kosher salt evenly over the turkey legs, rubbing it into the meat. Place the turkey legs on a plate or tray and let them sit in the refrigerator, uncovered, overnight.
Preheat your air fryer to 400ºF (204ºC) for about 5 minutes.
Make the dry rub seasoning. Mix garlic powder, onion powder, paprika, and black pepper in a small bowl.
Season the turkey legs. Remove the brined turkey from the fridge and discard any liquid that may have accumulated. Pat them dry with paper towels. Thoroughly rub the turkey with avocado oil. Then, sprinkle and massage the dry rub over the turkey legs. Make sure that all the nooks and crannies are well-seasoned.
Air fry the turkey legs. Place the seasoned turkey in the air fryer, ensuring they're not overcrowded. Set the temperature to 400ºF (204ºC) and cook for 30 - 40 minutes. Flip the legs halfway through.
Check the internal temperature. Insert a meat thermometer into the thickest part of the turkey. They're fully cooked once it reads a minimum temperature of 165ºF (74ºC). Otherwise, continue cooking.
Brush the buffalo sauce on the turkey. Once they're done, remove the turkey legs from the air fryer. Then, brush the sauce generously over each leg, coating them with that spicy goodness.
Serve and enjoy your air fried turkey legs!