A UPS store box option is to purchase the 10x10x48 Lamp Box. Then go to Office Max or Office Depot and buy bubble wrap (they charge way less than UPS). You can also buy a map tube from UPS that will hold a bubble wrapped barrel then bubble wrap the map tube and the butt stock. Cut down the box as it will cost less if it is not 48 inches (34 to 36 will work). Then take the box to the US Post office with a copy of the FFL of the receiver and mail it Priority Mail with insurance.
US Post insurance works better than UPS and the tracking is comparable.
