I would pay special attention to this section:
5.2.6 Collectors acquiring NFA firearms for their personal collections by acquiring dealers’ licenses and paying NFA special tax. Some NFA firearms collectors, who are not engaged in any firearms business, have been known to acquire a GCA license to deal in firearms and pay the NFA special tax to acquire NFA firearms for their personal firearms collections. They do so for a number of reasons: (1) to acquire firearms from nonlicensees residing out-of-state; (2) to circumvent requirements imposed on individuals to provide their fingerprints and photographs in order to receive NFA firearms and law enforcement certifications authorizing their receipt of such firearms; and (3) to avoid NFA transfer tax on firearms they receive from FFLs/SOTs.
Warning: These transactions violate the law and can only lead to trouble for the collector. In these instances, the collector has committed Federal felonies by falsely stating on a license application and special tax return that the collector intends to conduct a firearms business. Any NFA firearms received tax free by the collector are subject to transfer tax and the collector’s receipt of the firearms tax free violated the NFA. As held in ATF Ruling 76-22, these transfers are unlawful and the firearms received are subject to seizure and forfeiture.