I ran into this link over at militaryphotos.com, and I thought I'd copy the link here as well and share the joy. Appears to be a Polish gun magazine, but written in english. I don't know these guys and I am not affiliated with them in anyway.
This magazine has articles on the MSBS, Bren 805, and H&K416A5. And then some more for 200 pages worth. I have gone through some 70 pages so far and I think it is quite ok. YMMV.
https://fragout.uberflip.com/i/351299
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