this is not a Machine gun Post, it looks like a section post with the section Lewis gun at the sentry point,a Lewis gun is a light machine gun that can hold in its ammo drum a 30 or 50 round capability. a Machine gun the type Vickers used by NZ infantry is a battalion weapon and was not issued to 10 man sections in ww1. they are cooking up a brew on an improvised chuffer they have built,