Well my attempt to try the breechplig was a bust. I started with the Disc extreme because it is my favorite with the thumbhole stock. The adapter wouldn't fit the bolt, it was to tight,. I then decided to try the elite as it is my next favorite Knight. The adapter fit fine and the primer went in fine but would not come out. I had to knock the bolt back. It might work with a different primer but not with the federal I have.
So for now I'm sticking with the full plastic jacketand stock breech plug