Back to the topic. I remember that the first photos that showed how the inner parts of the collapsible stocks had holes, where of training models, presumably to save weight. Pictures with real guns either had the stock collapsed, or the stock is expanded but the picture doesn't show the upper part. There where images that actually had the upper part of the collapsible stock visible, but were too blurry to make something.
These images seem to show that the stock of the real models is solid, not having any holes. It would be more similar to the American M4a1.
These images seem to show that the stock of the real models is solid, not having any holes. It would be more similar to the American M4a1.