I bought the E9 - I assume "E for Economy model - and its plastic front sight held on for two magazines.
They replaced it with the note on the ticket "Replace front sight with Black Max." That is the elastomer doped version of Loctite. It has held up for occasional use ever since. My CW9's sight is thus far secure.
This is true, but so what? Why should we think a polygonal bore is superior and in a hideout gun at that?Additionally, if I remember correctly, the barrel in the C series is of a lesser grade including not having polygonal rifling like the K or P series which have barrels made by Lothar Walther.
And the slide stop is MIM vs machine cut.
My very crude looking E9 has the MIM slide stop. It also has a stop screw set into the frame, which appears to be located to keep the slide stop lug from whacking the notch hard enough to break it off.
Note that the "machine cut" slide stop of the P series is fabricated, you can see the seam where the shaft is brazed into the lever. Or could when I was in the market, maybe they are all one piece now.