The word "special " GENERALLY refers to the 4 position trigger group. I know the MX3 special was an exception and there may be others but I can't think of another.Did all TMX specials have the word special on the receiver? Saw a TMX today dated 1984 that had tapered rib ,palm swell and numbers matching but no special on the receiver??
tmx special nad sp4 adjustable triggerThe TMX special has the adjustable position trigger. Mike