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So as a C&R - One can in theory can ship directly to C&R licensee? in another state without an intermediate Class 03/02 dealer involved? THis makes it easier to transfer and sell. Does e-file also help this process? so suckers like me aren't waiting more than a year for what amounts to a NICS check with paper and fees.
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From the NFA Handbook (10.2.2), "A licensed collector may receive an NFA curio or relic firearm directly from any person in any State." NFA items would require the single transfer from the seller to the C&R licensee and you can ship directly to the licensee upon transfer. Link
HERE. E-file doesn't offer any unique processing advantage to C&R holders over an individual transfer.
You can verify the C&R status for an item from the latest list (https://www.atf.gov/firearms/curios-relics). If the item is not already in the C&R list, you can get a determination before submitting the Form 4.