Yeah, they've done a lot of improvements on the M16 design, but still not as reliable as the AK47.
another thing I like about the AK47 is it has never changed. over all this time, there hasn't been much of any need for improving it. they have done some small improvements on the sights and stuff I do believe but the over all gun is the same as it has always been.
Ol' Mikhail Kalashnikov got it right the 1st time.