Yes, you can send firearms to a gunsmoth or a manufacturer for repair or modification without going through an FFL.. Be cautious about how it's sent though. FedEx will ship handguns or longguns while UPS will only ship handguns overnight air(read very expensive). They clain it's in response to thefts of firearms at their transhipment point. I suppose it's easier to charge more than it is to catch the theives!!! For long arms USPS is usually the cheapest, but be certain to properly insure.. Also the USPS won't ship handguns... Although I've not tried. They will sometimes argue but they do ship weapons... Be sure it's NOT LOADED!!! good luck!!