What does “May take up to X days to ship due to Destination Address” mean?
Some warehouses are unable to ship directly to certain addresses, so the parts need to be transferred to an intermediate warehouse that is able to ship to the given destination. This often is the case for APO/FPO or other addresses where mail is the only available shipping method. If you want to avoid this delay, try having your order shipped to an address where FedEx or UPS can deliver (i.e. a physical address instead of an APO/FPO) if possible.