DETAILS, FICTION AND RARE BREED TRIGGER FRT

There have been a handful of things that the FATF claimed were being a no no as well as a judge someplace would strike down. Because it pertains to FRTs, are these legal to obtain anywhere or can it be just Texas?  Do You need to be described as a member of some gun rights org? Should you be a member of that org can you purchase them any place?Nev