Hi to all who have replied and thanks to you all.
Some interesting points raised that I had not thought of.
The most important thing for me was to know that I was not causing any unnecessary damage to my AKM's by inserting them into their scabbards the wrong way

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I am storing my bayonets in individual heavy cordura zip up knife pouches that have a black padded fleece lining which are stood on their edge or are laying flat in sealed storage boxes. Hope to get them displayed in cabinets at some point in the future.
Andy