I have heard of them and looked at the first one last week. Appears to be Norinco (failing memory). It feels shorted and heavier than the other Norinco's.
The stock looks like it was made for the action and everything is in the right place - meaning it doesn't have the profile cutout of the fixed mags. Doesn't look like a conversion to me and it is not one of the duckbill mags, but true AK mags with the ridge at the back.
What is the going price? $180 is asking for this one.
How is reliability compared to the fixed magazine guns?