If I take your class I will run either Vepr FM or SLR107 or Bren 2.
My back up for the other class was Marcolmar's CetmeL with Meprolight's M21. But I had more x39 ammo on hand than 5.56, so I went with the ACE.
All failures in AKs that I had were traced to using surplus mags. Bodies were dented, functioned fine with the wooden dowel, did not feed fast enough when fired.
I am pickier about the surplus magazines now, check the bodies and spring length.
Bad mags can be the Achilles heel of any auto or semi-auto.