I ordered a bunch of non-walk pins for all the AR15 models. The EBR store had one set of KNS non-walk, non-rotate pins which went in fairly easily. The problem is not the trigger mechanism, but rather there seems to be no earthly way to keep the pins inside the receiver. The instructions didn't help.
So the anti-walk pins seem to work well. However, I'm not sure of the exact trigger pull because my Lyman digital trigger gauge just died. It worked a few days ago, now I have to shop for an online bargain. :(
Good luck with the internet search, those can be tricky. Shipping and handling seem to be the new racket. Costs more than the part usually. grrr.