What are you talking about? Ammo availability?
Haven't added 7.62X39 yet and sold out everywhere.
There is actually more of the 223/5.56 available than the 308/7.62x51 or 7.62X39. Just these retailers are gouging the crap out of their prices.
As for the availability, yes across seas you may see it more available since everyone else in the world is using 7.62X39 but availability here to buy, the 5.56 seems more available.
As for reliability, they both are reliable. Just both have their own special needs and limitations. If you want to spray and pray, take the AK. If you want accuracy, AR.
It's nice to have an all American rifle and a lot of the parts are manufactured right here in America.
I have to say that the AK is a great weapon, just not for me. I'd rather have accuracy, reason why I recommend the Remington 700. Carrying less rounds means accuracy is important.
5.56 you can carry more rounds and magazines on ones person rather than half the amount going with the 7.62x51/7.62X39 unless you are built like Arnold.