I'm selling a new O/U and an interested buyer feels that, if the shotgun is broken down and sent in different boxes - e.g., barrel in one, receiver in another, etc., - an FFL is not needed. My position is that, at the very least, the receiver must be sent to an FFL for a legal transfer and that this applies to all intra/interstate transactions across the Union. I'd appreciate any comments clarifying this difference of opinion. Thanks.