My original plan was to replace the Finnish heads with Adrian helmet heads from Empress miniatures. I already had the heads from the earlier order so I stuck to the plan and swapped the heads on the Partisan lmg gunners.
Here is the first conversion on the left and the original on the right. The Chinese used the Czech ZB-28 lmg that the Bren gun was based on so a Bren gun is close enough for me. It will also be accurate for later WWII and post WWII games.