> The Kalashnikov had been designed in 1947
1944 actually, there were examples in trials by 1946. 1947 was the year of adoption of a developed version but it was only ever called AK in Soviet documents.
Something else the article gets wrong is use of a hyphen in M14, M16 etc. A minor point but immediately shows a lack of familiarity or research with the subject. It's like reading a 2019 article that talks about the i-Phone.