WHAT DOES RED ARMY STANDARD 7.62×39 MEAN?

Bob said: Among the list of couple destinations that had the 9 mm ammo that I have been endeavoring to get for 3 months. I feel our govt is intentionally generating ammo hard to get. I only wish I could verify it.Quality of your ammo is quite Great for the cost. also very happy with .ammo.com- getting the order out to me so i can blow up the target