Prepare a charcoal grill. Lightly oil the grates and add the patty. Cook to the desired level of doneness (the USDA recommends an internal temperature of 160 degrees).
Spread the barbecue sauce divided evenly on both sides of the bun. Place the onion rings followed by the beef patty on the heel of the bun. Place the bacon, criss-crossed, followed by the cheese on the crown of the bun. Place the crown of the bun on top of the burger.