Little article on Russian arms sale, not a subject we track: http://www.businessinsider.com/this-how-many-countries-buy-weapons-from-russia-2017-7
The article is based upon the first DIA report on the Russia/Soviet military that they have published since 1991. I have not read the report but note that the article states: “The DIA report, however, has been criticized by some for being too hawkish, just like previous DIA reports on the Soviet Union.” I have not reviewed the DIA report and don’t have the ability to really do so properly, but I do remember well their old reports in the 1980s, and they were certainly “too hawkish.” They clearly overemphasized Soviet strengths and ignored many of their weaknesses. The Soviet Union collapsed in 1991.
More to the point, we engaged one of the Soviet armed countries, Iraq, in the Gulf War in 1991; and we had a chance to review their military in the 1990s (something which I have some knowledge of). I have never seen a systematic analysis of what the defense and intelligence analysts were saying in the 1980s compared to what they were able to see in the 1990s, but there is an interesting story there about our misperceptions and failures to understand the Soviet military.