WHAT DOES FRT TRIGGER MEAN?

If neither of these have one particular obtainable, polymerpew.com could well be my 3rd option ,but I think they obtain their's from Deeznutz. The polypew guy has an awesome rep to the fbook SS group selling modified triggersIt is not a DIAS.  It duplicates the mechanical operation from the FRT... it just utilizes a "Disconnector" rather than a a