Alright, let's take a look at the weak point of any weapon, the magazine. Grab up the nearest AK mag and the nearest AR mag you have lying around. (Oh, you don't have one of each lying around since you don't own one of each? Then what's your basis of comparison? Why are you posting on this thread?) My AR mag has six weld points on the front and six on the back. My AK mag has 11 weld points on the front and 14 on the rib running down the back. The catch in the front of the AK mag has five welds holding it on and six holding on the tab on the back. I'm not an expert, but the AK magazine seems like it would hold up better to hard use. Plus, the obvious failure point would be the tabs on the front or back holding the magazine in the weapon. So, if the welds there break, the mag won't be held in the weapon, so you throw it away. If you break a weld on the AR mag, you can probably still seat it, but it won't feed properly due to bad feed lip geometry. So you say the AR is the problem when it is actually the magazine. The HK high reliability magazines for the AR solve this issue by using a line of weld down the spines instead of spot welding.
Next, let's look at the feed lips. The AK design appears to have been bent over and welded to the side of the top of the magazine. So we have feed lips that are doubly strong, and made out of steel in most cases to boot. Now, let's look at our AR magazine again. Single ply aluminum, you say? Correct. Much thinner and less durable, making it easier to bend and distort them. Oh, but you have the super high-speed, used by Delta Force, impervious to nuclear waste, made out of Kryptonite (okay, steel) HK high reliability magazines I mentioned previously? Good. Load one with 30 rounds, take it outside to the sidewalk, and drop it feed lips first. Go ahead, I'll wait. What? Your feed lips bent and it won't feed a round correctly now? Well, duh. Once again, the geometry of the AR magazine requires single ply construction at the feed lips, and steel bends, just like aluminum. Your AR is now a club.
So, the AR is a piece of junk due to its magazine design, right? Wrong. AK magazines were designed for hard use by an army that has no supply system except for our old Communist friends that lavished them with nothing but ammunition after their initial supply of rifles and mags were shipped in. The AR was designed for an army that has a working supply system and can replace magazines with ease. Here's the problem: no one knows that AR magazines were designed cheap because they were supposed to be disposable. Why should a company commander spend money on magazines when the ones in his arms room look just fine? Answer: they won't. I know this because in over nine years in the same unit, I have never seen new magazines unless they came with new rifles, like when we swapped our M16A2s for M4s. However, the supply source code for AR magazines is PACZZ, meaning that it is nonrepairable and nonrecoverable, as evidenced by the ZZ at the end. So these magazines are being used far beyond their usable service lives (Pat Rogers can tell you the actual service life, I don't remember at the moment), since no maintainer will inspect them for servicability. It is the responsibility of the user. Most users don't know that magazines have limited service lives, hence the perpetuation of the problem. Also, the user is only required to slide the magazine into the well to check for ease of insertion and check the spring tension and follower movement during maintenance. Both will pass with a broken but unloaded magazine, which is what you will have when conducting maintenance. No checks of the welds are required, and the problem will only manifest itself when the magazine is loaded. Also, no checks of the feed lips are required. You will find out that your mag is tango uniform when you are locking and loading. This is usually too late. However, I have developed a simple solution to mark defective magazines that I find, whether at the qualification range or during maintenance. You stomp it flat and bend it in half. Sooner or later, your company commander will realize that he is low on mags and order new ones.
So, in addition to checking your AR springs and followers, check your welds and your feed lips. Stop thinking your AR magazines are as durable as your AK mags and inspect and replace them on a regular basis, even your high-speed low-drag HK magazines. You'll find that your AR is just as reliable as an AK. How do I know? Well, I spent more time inspecting mags and ammo in Iraq than I did cleaning my M4 during two tours in Iraq. Yes, my AR was full of carbon, sand, and dust on a regular basis. Rarely lubed, too. I admit it, I'm a lazy slob. Yet my M4 never failed to fire. How odd. Could it be because I bought my own brand new magazines from a reputable manufacturer to take with me the second time? Or because I pored through about 40 magazines before I found the eight I trusted the most to take the first time? Could be. They weren't even HK mags, they were regular aluminum 30-rounders with Magpul followers and Ranger plates. Both times. And I took care of them, so they took care of me. So stop blaming the AR for unreliability because you won't feed it properly.
Once I take my new Yugo AK out for a spin, I'll comment on its accuracy. But while I've shot an AK before and it was reliable, we were just having fun blasting away and not really trying to test its accuracy. I can't and won't make any comments on its accuracy until I have tried it out for that purpose.
Lesson over. Go take your weapons to the range and give them a fair test or log out and go back to playing Counterstrike, whichever you prefer.
Edit: If this post offended you, then you probably don't have the knowledge or experience to be posting objectively on this thread. Go back to Counterstrike.