AK is excellent for Russian peasants who don't know much more than working swine
Need something with more kick, not a 5.56, more like a 7.62, but with more oomph than the AK round. I would go with an M-14 SOCOM II - full-grown, grown up cartridge, short and light(er) weapon, capable for short range massive firepower as well as reaching out and touching someone at long distances.
my 100,000,000 Icelandic kroner.