Anyone know the logical explanation for those "keychain loops"?
Tom, all Finnish infantry was and is also "ski troopers". When I served in jaeger troops in 2000-2001 we never even heard about the usage you mentioned. But it does not sound too far fetched. The latter explanation on the other hand does not sound too logical, not even with the older combat gear.The loops were used by ski troopers to retain the mags during reload on the move. Only know of one picture showing its use. It appears that Finnish soldiers made very little use of them.
One ex-Finnish soldier told me he thought they were to help in removing from magazine pouch.