I've shipped guns before after online sales through GB but I've never shipped a firearm back to a manufacturer for a warranty repair, so I have questions for those more knowledgeable.

1. The manufacturer sent me a RMA (Return Material Authorization) and a FedEx shipping label. I do have the original box the rifle came in. My question is, since I am supposed to ship it without any outside writing indicating that it is a firearm, am I required to put the boxed rifle into ANOTHER box or would wrapping it in brown shipping paper be sufficient?

2. When I have shipped guns before to FFL's I have always included a copy of the receiving FFL in the box. My RMA is not an FFL, but since it is going to the manufacturer am I right in thinking I don't need to address it to a specific FFL?

I'm sure this happens all the time but I want to make sure I cover all my bases legally.

Thanks in advance!