Question on the HK 416

[Schone23666]

I know this weapon (H&K 416) generated some press when it came out several years ago, quite a bit was made about the short-stroke piston system as opposed to the traditional gas-impingement system the M4's and M16's traditionally used. Now, I've been told that supposedly it's a more reliable system that doesn't require as much painstaking cleaning as the M4/M16 family (or so I'm told or have read) but I read a post from HorseSoldier about supposed issues with the accuracy of the weapon being a bit subpar, somewhere around 5 to 6 MOA on average? Is this true?? If so, what is the reason, would it have anything to do with the way the piston rod was designed alongside the barrel system on the weapon? And has there been any effort to improve or fix the issue by HK? Should any game stats for this weapon reflect it if it is indeed an issue?

Don't know what the word is on this particular matter, but any input would help. Just keep it FRIENDLY please.