It's not a stupid question.
The Commander frame's dust cover will be too short. There will be about a 1/32" gap between the slide's spring tunnel and the frame's dust cover.
Commander and Officer slides will work on all three.
I echo Jim's point about series 80 parts.
Also, remember there are other parts like ejectors, recoil spring guides, spring plugs, and springs that are different between the different models.
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Regards, Sharps.
[This message has been edited by sharpsrifle (edited March 16, 2000).]