Quoted:
Correct me if I am wrong, but won't the guide rod one one end rest on the barrel under-lug [steel]
and the other pass through a hole in the muzzle end of the slide [steel]? Besides, unless something
has change since I bought my CZ compact [P01], the guide rod is polymer.
The guiderod rests on the barrel lug only for the purposes of assembly and disassembly. When
you slide the slide/barrel/guide-rod/spring assembly onto the frame, the barrel lug slides through
a channel on the frame block. When the lug passes through, the block picks up the back-end
of the guide rod. That's were is rests until you disassemble it. When you slide the assembly off,
the barrel lug picks up the rear of the guide rod. It comes out like you put it in, with the guide rod
end resting on the barrel lug.
On a steel-frame CZ, the frame block is steel. It's aluminum on an aluminum-framed CZ. If the
guide rod is steel, it can wear the ears on the guide-rod channel in the frame block.
(FWIW, Sigs has steel frame blocks, even in aluminum framed guns.)