WHAT DOES RED ARMY STANDARD 7.62×39 MEAN?

The price was deffently high and go determine correct immediately after I ordered I discovered 1000rnds of loose pack 62gr lake city for a similar selling price as a single tin of 420rnds, but locating 556 ammo lately is deffently a chance of getting it and its selling price! Hopefully All of this Bull will probably be in excess of shortly!I've bee