Ovidio thanks for commenting. Interesting perspective and you could well be right. My offering has only come from reading other stories from Germanicon articles, in that nullacht funfzen meant rubbish/all buggered up! Maybe it is the same thing - simple AND useless!
In reality it was a fairly average to poor assault weapon, heavy even without ammunition and then add a further weighty assault drum with only 100 rds you can see resupply is an immediate issue. The position of the bipod also was a significant design failing, only rectified in the inter-war period. As a static defence weapon, using the 250 rd belts then clearly it was of more use/value. Especially when the Germans had forward defence in depth.
Mark