Let me make a slight correction...when I was stationed in Egypt, I did see several Egyptian AKMs modified by troops to accept either the AK or AKM bayonet. This involved cutting a small notch under the AKM FSB and it worked quite well although it was a little loose on the gas block. Apparently, someone had ordered the wrong bayonets and rather than discarding them, they improvised.
My personal Maadi is modified as such and will accept either an AK or AKM bayonet, but this is not the norm.
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