As this topic has been beat to death on other forums, it seems to me that shooters that want to bring AK's to tactical rifle matches and compete with AR's are all searching for a speed change/charge solution, thereby creating a market for AM conversions. A so called "tactical" mag change on a closed bolt seems to be the driver for all this hardware.
IMHO, 95% of AK rifle owners who don't pursue match activity are not really concerned with a few tenths of a second to do a reach over or under. One thirty rounder in the weapon should handle the majority of scenarios in the unlikely event that one would come into harms way and use the rifle for that which it is intended.
I mean realistically, if one was in an engagement that required multiple magazine changes, that would be a serious firefight. The rifle matches try to simulate this for competition (fun) and challenge. No cover - exposed "on the run" mag changes and re-charge just don't fit in to anticipated "likely" real world scenarios for me. The changes to the AK platform are just not justified. It ain't broke, IMHO, I don't need to "fix" it.
Just my 2 cents.