Square up the ribs, and remove the silverskin. Rub both sides with olive oil, and then apply 2 tbsp of the rub.
Place the ribs in your smoker meat side up and let cook at 180 degrees for three hours.
Remove the ribs from the smoker and double wrap with foil. Before sealing add the butter, apple juice, brown sugar, and the remainder of the rub.
Place the ribs back in the smoker and let cook at 225 degrees for an additional 2.5-3 hours
Carefully remove the ribs from the foil and place back in the smoker. Brush with barbecue sauce and turn up the heat to 275. Let the ribs cook for about 30 more minutes.
Remove ribs from smoker and let rest for 10 minutes
After the ribs have rested, carefully remove each of the bones, and then place the rack on top of your bread. Generously top with pickled onion and more barbecue sauce, slice, and serve.