Yes, Trigger guard. You have to remove the 3 screws of the BS (backstrap), take it off, and then the 3 screws of the TG. Also loosen the mainspring screw to ease in removing and re-installing the TG. Put back together in reverse order. Be sure and have a good fitting screwdriver and be sure to put the same screws back in the same holes, as the bottom screw in the backstrap and the top screw in the TG are longer.
'This is King Fisher's Road--Take the other one'