Best upgrade on that setup, is that you can swap out the C39V2 to another AK.
I love when people talk down on someone else's firearms, yet have absolutely zero clue how well that firearm runs. One person may have issues with a particular gun while another doesn't. I know what my C39v2 can do, so your snobbery is uncalled for. I'm betting you've never actually owned a C39v2 or even shot one long enough to notice any issues.