Saying that AK's were designed for reliability and that you shouldn't worry about accuracy is a little like saying AR's were designed for accuracy and you shouldn't worry about reliability. The overwhelming majority of us want both reasonable accuracy and reasonable reliability. Because the AK is somewhat lacking in this area doesn't mean it's less important but rather more important. Almost all AK's are reliable. The difference between a good one and a bad one is mostly how well it shoots.
Of course you have to be reasonable. An iron sighted WASR, MAK90 or other cheap AK in 7.62x39 shooting Wolf ammo is probably only going to shoot about 6 MOA and that's assuming the person knows how to shoot with iron sights. Use a well mounted scope and quality ammo and those same rifles will probably do 4 MOA or better.
At the other end of the spectrum, a scoped Saiga or Vepr in .223, shooting Black Hills Match or handloads will probably do 2 MOA or better.
Of course you have to be reasonable. An iron sighted WASR, MAK90 or other cheap AK in 7.62x39 shooting Wolf ammo is probably only going to shoot about 6 MOA and that's assuming the person knows how to shoot with iron sights. Use a well mounted scope and quality ammo and those same rifles will probably do 4 MOA or better.
At the other end of the spectrum, a scoped Saiga or Vepr in .223, shooting Black Hills Match or handloads will probably do 2 MOA or better.