I went down to UPS earlier this year to ship some rifle scopes, magazines, barrels, and other related rifle parts. They refused to ship anything gun related.
I switched to FedEx. Cheaper, Faster, Easier, and the girls are prettier.
Ot oh Buckwheat.
Steps for how to ship firearms
Shippers with a Federal Firearm License
Only customers holding a Federal Firearms License (FFL) and federal, state, or local government agencies may ship firearms with FedEx. Customers holding an FFL must enter into an approved FedEx Firearms Shipping Compliance Agreement before shipping any firearms with FedEx. Also, you must be an approved firearm shipper with a signed contract on file with FedEx. For more information, contact your FedEx account executive.
Nonlicensee shippers
Nonlicensees are prohibited from shipping firearms with FedEx.
https://www.fedex.com/en-us/shipping/how-to-ship-firearms.html
