If you have a Masterbuilt barbecue, I just found a handy accessory that can convert your existing grill into a pizza oven – and it’s pretty affordable, too. The Masterbuilt Pizza Oven Attachment is a grill insert with a pizza stone that slots into your barbecue so you can make pizzas on the grill. Latest Videos From T3 Watch full video here:The Masterbuilt Pizza Oven Attachment looks like most pizza ovens on the market, except it doesn’t have any controls. (Image credit: Masterbuilt)You don’t just have to use the Masterbuilt Pizza Oven Attachment for pizzas, either. The Masterbuilt Pizza Oven Attachment is compatible with most of its gas , pellet and charcoal barbecues, including its Gravity Series.