It's no wonder the McRib is The Most Important Sandwich of The Year - seasoned boneless pork dipped in tangy BBQ sauce, topped with slivered onions, crunchy dill pickle chips, and served on a toasted homestyle bun. This sandwich is only here for a limited time, so don't miss out and get free large Fries with its rewards by downloading the app and joining MyMcDonald's Rewards.