i always thought that it was the screw that you have to take the stock off to get at. it's to try and put people off messing with it. jim tyler did and article about tweaking the rekord trigger. he mentioned bending the little lug and warned folk not to go there. it does the job, but isn't the correct way of doing it.
when set up right the rekord is a awesome trigger.
i'd imagine you could google it.