Old Sparky,
Don't believe that to be true for the following reasons:
1. I ordered a new stainless T/C Encore receiver (no barrel) configured as a rifle with rifle butt stock and forearm and it was processed by my FFL as a long gun. T/C Encores and Contenders can be ordered from various places as one or the other.
2. I bought a AR 15 stripped lower and the FFL processed it as an "other" and it becomes a pistol or long gun by what it is assembled as first.
3. If it was originally sold as a long gun it must remain a long gun for life, but may be configured as a hand gun or a long gun if originally sold as a hand gun.
I am not a lawyer, LEO, or FFL but that is my understanding of federal law.
r/shvlhead.45