PSA multi cal lower

[FLshooter]

I realized this morning that I should’ve called ATF to get the facts,instead of everyone’s opinion .So,I called them this morning. I asked the agent if I could use a lower I had hanging around for a pistol build. He said, “let me check it for you“.So I gave him the serial number and it came is listed as “other”.So his answer was, “you can use it for pistol or rifle”.
He went on to tell me that the lower is whatever the builder classifies it to be.Anything else doesn’t matter.
So if anyone has the same question I asked. All you have to do is look up the serial number of your lower and you will find out if it is a rifle,pistol or other.. End of story.