I know this is old, but i am doing one now and have some questions. It looks like the hole for the bolt catch pin is threaded? It also seems like the bolt catch doesnt sit all the way down. Maybe i have a misdrilled catch or somethi g? I put the pivot pin spring and detent in and it definitely doesnt spring back out...no clue how i am going to retrieve it. For the takedown pin i drilled the detent hole a little larger and cut the spring shorter because it was too much pressure and rhe pin wouldn't budge at all. I have everything working now, except the bolt catch....
