p80 build

I am working on a 76% frame . It only has the rear rails with the frame. Will any Glock 19 frame internals ( locking block, trigger, etc) fit or is there specific parts only? Any help is appreciated, first time doing this.

So, while sanding down the channel of a project I just started working on, I accidentally shaved a little bit of this part of the frame. I worked on many projects before, but haven’t had this happen; So I ask, will this mess up the entire build? Note: I don't have any of the internals and I...