To save us both money. Some shipments we will split if it costs less. If we can ship for less, we can sell for less and that makes everyone happy.If you don't want to use USPS you always have the option to specify Fed-Ex and not the FREE shipping option if you are willing to pay the extra costs.Some items are very large and can not be shipped by the USPS (at a reasonable price)Items that can not ship USPS Flat Rate;16" gongsFull Size Torsos (18x30)Steel Challenge BasesStatic torso bases24" GongsKYL Target CENTERFIRE KYL Legs and Center SectionPortable Target Stands (SKU: STAND-PORT-NF)18x24 steel challenge plateYou can get a rate quote anytime in the shopping cart.You can see what that looks like