List of services (http://www.sigsauer.com/Products/documents/2007CustomShopServicesPriceList.pdf)
Would I have to use a FFL for sending/receiving the gun?
No, you can send it UPS or FedEx (must be Next Day Air service). It is going to the manufacturer for repair, no FFL needed on your end. However, it can't hurt to ask your FFL if - for a small fee plus the postage for Priority or Express Mail - they can ship it, as Next Day Air will cost $50-$60.
If you enjoyed reading about "Will SIG perform their CPO serivce on my SIG?" here in TheHighRoad.org archive, you'll LOVE our community. Come join TheHighRoad.org today for the full version!