GETTING MY RARE BREED TRIGGER 3 POSITION UPGRADE TO WORK

There are already a handful of things that the FATF reported were a no no plus a choose somewhere would strike down. Since it pertains to FRTs, are these lawful to buy anyplace or is it just Texas?  Do You will need to be a member of some gun legal rights org? If you are a member of that org can you purchase them any place?AR15.COM is the planet's