THE BASIC PRINCIPLES OF RARE BREED TRIGGERS

There happen to be a handful of things that the FATF said were being a no no and a choose someplace would strike down. Because it pertains to FRTs, are these legal to purchase everywhere or could it be just Texas?  Do You need to be a member of some gun legal rights org? If you're a member of that org can you buy them any place? Rare Breed Trigger