Ad: This forum contains affiliate links to products on Amazon and eBay. More information in Terms and rules
I must report the complete lack of WW2 knowledge and research by the younger "production" writers.
A workmate used to live up the road from the AK factory as a kid. Their school trip one year was a visit to it to see how they were made."Kalashnikov", a movie in Russian with English subtitles, and obviously about MK's efforts and success leading to the AK47. Worth watching.
I enjoyed this series, too.Foyle's War S1 E1&2
Which also has one of the coolest theme songs, not quite Mancini's Peter Gunn theme but pretty high on the list.