I would also figure that the majority of the AK's being used over there are of the 7.62 variety, not the 5.45.
Plenty left over, more ammo than you can use, etc, etc, etc, althought what do I know, I aint there.
I own a 47... fantastic combat rifle. If you want to shoot apples at 300 yards, better to have an A2, but the Kalashnikov fires time and again.