At what range? The 7.62 x39 is pretty anemic beyond 400 yards. The srticle says “long range.”
All I can tell you is, I listened to a speaker years ago talk about this to a very large group. The guy was part of the DHS said something other than what the article published. And I have read other information about it over the years that doesn’t even come close to this article. So i question the current article’s information.