I bought a new firearm in February. A part came off after an outing. I contacted the manufacturer who said to send it back with a work order as it is covered by their warranty. It was shipped back to them via UPS Next Day Air. It is now two days past the scheduled delivery date, I called UPS, and they don't know where it is, so they opened an investigation to find it. If they can't, I'll have to "enjoy" the delight of filing a claim with them. I hope that they do locate the package and this question remains purely academic, but if it doesn't, I'd like to be ready to take whatever steps necessary. I understand that an FFL must report any lost or stolen firearm to the ATF. Ditto NFA firearms by both licensees and non-licensees. I see nothing on their site that indicates that applies to non-licensees who have a lost Title I item, nor do they appear to accept such reports. Question: If a non-licensee returned a regular, Title I firearm to the manufacturer for warranty repair, but the carrier lost the package in transit, what steps should be taken with any law enforcement agency? Presumably a report should be made with a local agency. I don't live within city limits, so I'd imagine it would be filed with the Sheriff's office. Beyond the legal requirements, what are some advisable additional steps? Thanks much any guidance.