First off, there's this word "accuracy" being used, but often (I believe) it's misunderstood and/or confused with "precision". Because of this, many guns are accused of being "inaccurate". I've noticed that the AK tends to be lumped into this with an unfair bias.
Have a look at the attached pic. In my experience of shooting various AKM's and watching others shoot them, the AKM generally falls under the two targets on the right. Usually, the last target represents the "average" guy enjoying a new WASR with mixed brands of ammo while shooting off hand with intermediate skill sets. I have done PLENTY of this. Consequently, I've done this with an AR, G3, M1A, FAL and others... We've all goofed off a time or two, and it's kinda fun! Am I wrong?
That target also represents some loose sight, worn bore, broken, abused and ready for the parts bin rifles, but those aren't what we're looking at. If we're talking about poorly made, poorly maintained or just plain broken, it needs to be fixed or replaced and doesn't apply.
Now, from my experience, the second to the last target represents the "average" AKM with "decent" ammo and a more mindful/skilled shooter at a bench or even prone. Again, I've done this as well with the AKM, AR, G3, M1A, etc.. This target is accurate. It is, however, not precise. This is where I see and hear of many accusing their guns of being inaccurate. I know this because I used to be in that camp.
As an example, I have a FAL with optic that used plant 3" to 5" groups at 100 using that various "average" ammo and my intermediate shooting skills that I before mentioned. One day, I took a class. The groups tightened to 2" to 3", but the rifle didn't get more "accurate". I got more precise. Later, I decided to work up a load for the rifle, and it yields 1" groups now. Again, the rifle did not become more accurate, but rather my ammo was more precise. The only other mod to the rifle since then has been a PRS stock to gain a better cheek weld.
Of course, the FAL that I started with is by no means a "match grade AR", but still has a lot more quality manufacturing than a standard WASR.. I get that, but not all AKM's are WASR's, are they?
So, if a decent shooter behind an average AKM can shoot an accurate 4" group using standard ammo, why can't it shoot better with a more precise load? Is there anything that the shooter can do to improve with that platform? How often is the AK (or any rifle) accused of being inaccurate because of a misconception, or is the reality that we're more concerned about precision than we are accuracy?